{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-21247", "tracking": { "current_release_date": "2026-07-23T18:31:51.750195Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-21247", "initial_release_date": "2026-02-10T18:17:57.921600Z", "revision_history": [ { "date": "2026-02-10T18:17:57.921600Z", "number": "1", "summary": "NCSC Score created." }, { "date": "2026-02-10T18:23:35.528766Z", "number": "2", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (21).| Product Threats created (42).| Product Remediations created (29).| CWES updated (1).| Exploitable created." }, { "date": "2026-02-10T18:23:47.855097Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-02-10T18:29:30.227743Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-02-10T18:29:34.356529Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-02-10T18:38:45.913059Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (18).| References created (1).| CWES updated (1)." }, { "date": "2026-02-10T18:38:59.387665Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-02-10T19:04:01.561162Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-02-10T19:04:35.247178Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-02-10T19:04:50.645665Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-02-10T19:17:48.672293Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-02-11T06:26:09.921101Z", "number": "12", "summary": "Unknown change." }, { "date": "2026-02-11T10:06:13.206324Z", "number": "13", "summary": "Source connected.| CVE status created. (valid)| Products connected (19).| Product Identifiers removed (1).| Product Identifiers created (1).| References created (3)." }, { "date": "2026-02-11T10:06:18.900751Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-02-11T14:14:31.882510Z", "number": "15", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-11T21:26:01.585939Z", "number": "16", "summary": "Products connected (12).| Product Identifiers created (15).| Product Identifiers removed (3)." }, { "date": "2026-02-11T21:26:03.211192Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-02-27T14:22:31.573748Z", "number": "18", "summary": "NCSC Score updated." }, { "date": "2026-03-07T03:28:42.444559Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-03-20T10:05:21.407189Z", "number": "20", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T10:05:23.967152Z", "number": "21", "summary": "NCSC Score updated." }, { "date": "2026-03-20T18:14:20.752366Z", "number": "22", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (12).| Product Identifiers created (12).| References created (1).| CWES updated (1)." }, { "date": "2026-03-20T18:14:31.306485Z", "number": "23", "summary": "NCSC Score updated." }, { "date": "2026-03-27T11:50:26.705331Z", "number": "24", "summary": "Product Identifiers removed (1).| Product Identifiers created (1).| Products connected (1).| References created (1)." }, { "date": "2026-03-27T11:50:38.723601Z", "number": "25", "summary": "NCSC Score updated." }, { "date": "2026-03-30T14:39:12.738778Z", "number": "26", "summary": "NCSC Score updated." }, { "date": "2026-04-06T05:12:29.063329Z", "number": "27", "summary": "NCSC Score updated." }, { "date": "2026-04-10T14:39:52.890560Z", "number": "28", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (18).| References created (1).| CWES updated (1).| Unknown change." }, { "date": "2026-04-10T14:40:06.465460Z", "number": "29", "summary": "NCSC Score updated." }, { "date": "2026-04-10T16:07:08.392764Z", "number": "30", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-06-04T17:32:40.972072Z", "number": "31", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-06-04T17:32:43.782133Z", "number": "32", "summary": "NCSC Score updated." }, { "date": "2026-06-05T02:38:31.832770Z", "number": "33", "summary": "NCSC Score updated." }, { "date": "2026-06-15T17:50:17.364690Z", "number": "34", "summary": "EPSS updated." }, { "date": "2026-06-15T17:50:19.743708Z", "number": "35", "summary": "NCSC Score updated." }, { "date": "2026-07-23T15:37:36.547722Z", "number": "36", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-07-23T15:37:40.831831Z", "number": "37", "summary": "NCSC Score updated." } ], "status": "interim", "version": "37" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/server 2016 cumulative update 23", "product": { "name": "vers:unknown/server 2016 cumulative update 23", "product_id": "CSAFPID-5592471", "product_identification_helper": { "cpe": "cpe:/a:microsoft:exchange:server_2016_cumulative_update_23" } } }, { "category": "product_version_range", "name": "vers:unknown/server 2019 cumulative update 14", "product": { "name": "vers:unknown/server 2019 cumulative update 14", "product_id": "CSAFPID-5592470", "product_identification_helper": { "cpe": "cpe:/a:microsoft:exchange:server_2019_cumulative_update_14" } } }, { "category": "product_version_range", "name": "vers:unknown/server 2019 cumulative update 15", "product": { "name": "vers:unknown/server 2019 cumulative update 15", "product_id": "CSAFPID-5592467", "product_identification_helper": { "cpe": "cpe:/a:microsoft:exchange:server_2019_cumulative_update_15" } } } ], "category": "product_name", "name": "Exchange" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1429705", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_server_2012:-" } } } ], "category": "product_name", "name": "Microsoft Windows Server 2012" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1429704", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_server_2012_r2:-" } } } ], "category": "product_name", "name": "Microsoft Windows Server 2012 R2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1429709", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_server_2016:-" } } } ], "category": "product_name", "name": "Microsoft Windows Server 2016" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1429706", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_server_2019:-" } } } ], "category": "product_name", "name": "Microsoft Windows Server 2019" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1429707", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_server_2022:-" } } } ], "category": "product_name", "name": "Microsoft Windows Server 2022" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": 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"vers:unknown/version 26h1", "product_id": "CSAFPID-5592468", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_11:version_26h1" } } } ], "category": "product_name", "name": "Windows 11" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.22631.0|<10.0.22631.6649", "product": { "name": "vers:unknown/10.0.22631.0|<10.0.22631.6649", "product_id": "CSAFPID-5590115" } } ], "category": "product_name", "name": "Windows 11 Version 23H2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.26100.0|<10.0.26100.7840", "product": { "name": "vers:unknown/10.0.26100.0|<10.0.26100.7840", "product_id": "CSAFPID-5590117" } } ], "category": "product_name", "name": "Windows 11 Version 24H2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.26200.0|<10.0.26200.7840", "product": { "name": "vers:unknown/10.0.26200.0|<10.0.26200.7840", "product_id": "CSAFPID-5590113" } } ], "category": "product_name", "name": "Windows 11 Version 25H2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.28000.0|<10.0.28000.1575", "product": { "name": "vers:unknown/10.0.28000.0|<10.0.28000.1575", "product_id": "CSAFPID-5590105" } } ], "category": "product_name", "name": "Windows 11 Version 26H1" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.22631.0|<10.0.22631.6649", "product": { "name": "vers:unknown/10.0.22631.0|<10.0.22631.6649", "product_id": "CSAFPID-5590114" } } ], "category": "product_name", "name": "Windows 11 version 22H3" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.28000.0|<10.0.28000.1575", "product": { "name": "vers:unknown/10.0.28000.0|<10.0.28000.1575", "product_id": "CSAFPID-5590104" } } ], "category": "product_name", "name": "Windows 11 version 26H1" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.14393.0|<10.0.14393.8868", "product": { "name": "vers:unknown/10.0.14393.0|<10.0.14393.8868", "product_id": "CSAFPID-5590120" } } ], "category": "product_name", "name": "Windows Server 2016" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.14393.0|<10.0.14393.8868", "product": { "name": "vers:unknown/10.0.14393.0|<10.0.14393.8868", "product_id": "CSAFPID-5590121" } } ], "category": "product_name", "name": "Windows Server 2016 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.17763.0|<10.0.17763.8389", "product": { "name": "vers:unknown/10.0.17763.0|<10.0.17763.8389", "product_id": "CSAFPID-5590107" } } ], "category": "product_name", "name": "Windows Server 2019" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.17763.0|<10.0.17763.8389", "product": { "name": "vers:unknown/10.0.17763.0|<10.0.17763.8389", "product_id": "CSAFPID-5590108" } } ], "category": "product_name", "name": "Windows Server 2019 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.20348.0|<10.0.20348.4773", "product": { "name": "vers:unknown/10.0.20348.0|<10.0.20348.4773", "product_id": "CSAFPID-5590109" } }, { "category": "product_version_range", "name": "vers:unknown/23h2 edition", "product": { "name": "vers:unknown/23h2 edition", "product_id": "CSAFPID-1189229", "product_identification_helper": { "cpe": "cpe:/o:microsoft:windows_server_2022:23h2_edition" } } } ], "category": "product_name", "name": "Windows Server 2022" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.25398.0|<10.0.25398.2149", "product": { "name": "vers:unknown/10.0.25398.0|<10.0.25398.2149", "product_id": "CSAFPID-5590116" } } ], "category": "product_name", "name": "Windows Server 2022, 23H2 Edition (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.26100.0|<10.0.26100.32370", "product": { "name": "vers:unknown/10.0.26100.0|<10.0.26100.32370", "product_id": "CSAFPID-5590118" } } ], "category": "product_name", "name": "Windows Server 2025" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.26100.0|<10.0.26100.32370", "product": { "name": "vers:unknown/10.0.26100.0|<10.0.26100.32370", "product_id": "CSAFPID-5590112" } } ], "category": "product_name", "name": "Windows Server 2025 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.14393.8868", "product": { "name": "vers:unknown/<10.0.14393.8868", "product_id": "CSAFPID-5594503", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "windows_10_1607" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.17763.8389", "product": { "name": "vers:unknown/<10.0.17763.8389", "product_id": "CSAFPID-5594504", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "windows_10_1809" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.19044.6937", "product": { "name": "vers:unknown/<10.0.19044.6937", "product_id": "CSAFPID-5594505", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "windows_10_21h2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.19045.6937", "product": { "name": "vers:unknown/<10.0.19045.6937", "product_id": "CSAFPID-5594506", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "windows_10_22h2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.22631.6649", "product": { "name": "vers:unknown/<10.0.22631.6649", "product_id": "CSAFPID-5594507", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "windows_11_23h2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.26100.7781", "product": { "name": "vers:unknown/<10.0.26100.7781", "product_id": "CSAFPID-5594508", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*" } } } ], "category": "product_name", "name": "windows_11_24h2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.26200.7781", "product": { "name": "vers:unknown/<10.0.26200.7781", "product_id": "CSAFPID-5594509", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*" } } } ], "category": "product_name", "name": "windows_11_25h2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.14393.8868", "product": { "name": "vers:unknown/<10.0.14393.8868", "product_id": "CSAFPID-5594510", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "windows_server_2016" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.17763.8389", "product": { "name": "vers:unknown/<10.0.17763.8389", "product_id": "CSAFPID-5594511", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "windows_server_2019" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.20348.4711", "product": { "name": "vers:unknown/<10.0.20348.4711", "product_id": "CSAFPID-5594512", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "windows_server_2022" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.25398.2149", "product": { "name": "vers:unknown/<10.0.25398.2149", "product_id": "CSAFPID-5594513", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "windows_server_2022_23h2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<10.0.26100.32313", "product": { "name": "vers:unknown/<10.0.26100.32313", "product_id": "CSAFPID-5594514", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "windows_server_2025" } ], "category": "vendor", "name": "Microsoft" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1453870", "product_identification_helper": { "cpe": "cpe:/h:hitachi:storage:-" } } } ], "category": "product_name", "name": "Hitachi Storage" } ], "category": "vendor", "name": "Hitachi" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-21247", "cwe": { "id": "CWE-122", "name": "Heap-based Buffer Overflow" }, "notes": [ { "category": "description", "text": "

Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally.

\n", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Feb" }, { "category": "description", "text": "Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-21247" }, { "category": "description", "text": "Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-21247" }, { "category": "description", "text": "Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-21247" }, { "category": "description", "text": "Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21247.json" }, { "category": "other", "text": "0.00548", "title": "EPSS" }, { "category": "other", "text": "8.4", "title": "NCSC Score" }, { "category": "other", "text": "Is related to (a version of) product Windows, There is product data available from a private source, VENDOR FIX as product remediation category, Is related to (a version of) product Windows H, There is cvss data available from a private source, Is related to (a version of) product Windows Version, There is news data available from source Bleepingcomputer, Is related to (a version of) product Windows Server", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5589984", "CSAFPID-5589986", "CSAFPID-5589987", "CSAFPID-5589988", "CSAFPID-5589989", "CSAFPID-5589990", "CSAFPID-5589993", "CSAFPID-5589994", "CSAFPID-5589997", "CSAFPID-5589998", "CSAFPID-5589999", "CSAFPID-5590000", "CSAFPID-5590001", "CSAFPID-5590002", "CSAFPID-5590003", "CSAFPID-5590004", "CSAFPID-5590005", "CSAFPID-5590007", "CSAFPID-5590008", "CSAFPID-5590009", "CSAFPID-5590010", "CSAFPID-5590104", "CSAFPID-5590105", "CSAFPID-5590106", "CSAFPID-5590107", "CSAFPID-5590108", "CSAFPID-5590109", "CSAFPID-5590110", "CSAFPID-5590111", "CSAFPID-5590112", "CSAFPID-5590113", "CSAFPID-5590114", "CSAFPID-5590115", "CSAFPID-5590116", "CSAFPID-5590117", "CSAFPID-5590118", "CSAFPID-5590119", "CSAFPID-5590120", "CSAFPID-5590121", "CSAFPID-1189225", "CSAFPID-1189227", "CSAFPID-1189228", "CSAFPID-1189229", "CSAFPID-1189232", "CSAFPID-1189233", "CSAFPID-1305167", "CSAFPID-1429704", "CSAFPID-1429705", "CSAFPID-1429706", "CSAFPID-1429707", "CSAFPID-1429709", "CSAFPID-2908521", "CSAFPID-5046795", "CSAFPID-5592467", "CSAFPID-5592468", "CSAFPID-5592469", "CSAFPID-5592470", "CSAFPID-5592471", "CSAFPID-5594503", "CSAFPID-5594504", "CSAFPID-5594505", "CSAFPID-5594506", "CSAFPID-5594507", "CSAFPID-5594508", "CSAFPID-5594509", "CSAFPID-5594510", "CSAFPID-5594511", "CSAFPID-5594512", "CSAFPID-5594513", "CSAFPID-5594514", "CSAFPID-1453870" ] }, "references": [ { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Feb" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21247" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-21247" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-21247" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21247.json" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0053" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-february-2026-patch-tuesday-fixes-6-zero-days-58-flaws/" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0369.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-21247" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-21247" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21247.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=10000" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=20000" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=30000" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-february-2026-patch-tuesday-fixes-6-zero-days-58-flaws/" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21247" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0369.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0369" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://msrc.microsoft.com/update-guide/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.hitachi.com/products/it/storage-solutions/sec_info/2026/02.html" } ], "remediations": [ { "category": "vendor_fix", "details": "5077179", "product_ids": [ "CSAFPID-5589984", "CSAFPID-5590010" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5077179" }, { "category": "vendor_fix", "details": "5075904", "product_ids": [ "CSAFPID-5589986", "CSAFPID-5589987", "CSAFPID-5589988" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075904" }, { "category": "vendor_fix", "details": "5075906", "product_ids": [ "CSAFPID-5589989", "CSAFPID-5589990" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075906" }, { "category": "vendor_fix", "details": "5075943", "product_ids": [ "CSAFPID-5589989", "CSAFPID-5589990" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075943" }, { "category": "vendor_fix", "details": "5075912", "product_ids": [ "CSAFPID-5589993", "CSAFPID-5589994" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075912" }, { "category": "vendor_fix", "details": "5075899", "product_ids": [ "CSAFPID-5589997", "CSAFPID-5590005" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075899" }, { "category": "vendor_fix", "details": "5075942", "product_ids": [ "CSAFPID-5589997", "CSAFPID-5590005" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075942" }, { "category": "vendor_fix", "details": "5077181", "product_ids": [ "CSAFPID-5589998", "CSAFPID-5589999", "CSAFPID-5590003", "CSAFPID-5590004" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5077181" }, { "category": "vendor_fix", "details": "5077212", "product_ids": [ "CSAFPID-5589998", "CSAFPID-5589999", "CSAFPID-5590003", "CSAFPID-5590004" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5077212" }, { "category": "vendor_fix", "details": "5075941", "product_ids": [ "CSAFPID-5590000", "CSAFPID-5590001" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075941" }, { "category": "vendor_fix", "details": "5075897", "product_ids": [ "CSAFPID-5590002" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075897" }, { "category": "vendor_fix", "details": "5075999", "product_ids": [ "CSAFPID-5590007", "CSAFPID-5590008", "CSAFPID-5590009" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5075999" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C", "baseScore": 7.3, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1189225", "CSAFPID-1189227", "CSAFPID-1189228", "CSAFPID-1189229", "CSAFPID-1189232", "CSAFPID-1189233", "CSAFPID-1305167", "CSAFPID-1429704", "CSAFPID-1429705", "CSAFPID-1429706", "CSAFPID-1429707", "CSAFPID-1429709", "CSAFPID-1453870", "CSAFPID-2908521", "CSAFPID-5046795", "CSAFPID-5589984", "CSAFPID-5589986", "CSAFPID-5589987", "CSAFPID-5589988", "CSAFPID-5589989", "CSAFPID-5589990", "CSAFPID-5589993", "CSAFPID-5589994", "CSAFPID-5589997", "CSAFPID-5589998", "CSAFPID-5589999", "CSAFPID-5590000", "CSAFPID-5590001", "CSAFPID-5590002", "CSAFPID-5590003", "CSAFPID-5590004", "CSAFPID-5590005", "CSAFPID-5590007", "CSAFPID-5590008", "CSAFPID-5590009", "CSAFPID-5590010", "CSAFPID-5590104", "CSAFPID-5590105", "CSAFPID-5590106", "CSAFPID-5590107", "CSAFPID-5590108", "CSAFPID-5590109", "CSAFPID-5590110", "CSAFPID-5590111", "CSAFPID-5590112", "CSAFPID-5590113", "CSAFPID-5590114", "CSAFPID-5590115", "CSAFPID-5590116", "CSAFPID-5590117", "CSAFPID-5590118", "CSAFPID-5590119", "CSAFPID-5590120", "CSAFPID-5590121", "CSAFPID-5592467", "CSAFPID-5592468", "CSAFPID-5592469", "CSAFPID-5592470", "CSAFPID-5592471", "CSAFPID-5594503", "CSAFPID-5594504", "CSAFPID-5594505", "CSAFPID-5594506", "CSAFPID-5594507", "CSAFPID-5594508", "CSAFPID-5594509", "CSAFPID-5594510", "CSAFPID-5594511", "CSAFPID-5594512", "CSAFPID-5594513", "CSAFPID-5594514" ] } ], "threats": [ { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely", "product_ids": [ "CSAFPID-5589984", "CSAFPID-5589986", "CSAFPID-5589987", "CSAFPID-5589988", "CSAFPID-5589989", "CSAFPID-5589990", "CSAFPID-5589993", "CSAFPID-5589994", "CSAFPID-5589997", "CSAFPID-5589998", "CSAFPID-5589999", "CSAFPID-5590000", "CSAFPID-5590001", "CSAFPID-5590002", "CSAFPID-5590003", "CSAFPID-5590004", "CSAFPID-5590005", "CSAFPID-5590007", "CSAFPID-5590008", "CSAFPID-5590009", "CSAFPID-5590010" ] }, { "category": "impact", "details": "Remote Code Execution", "product_ids": [ "CSAFPID-5589984", "CSAFPID-5589986", "CSAFPID-5589987", "CSAFPID-5589988", "CSAFPID-5589989", "CSAFPID-5589990", "CSAFPID-5589993", "CSAFPID-5589994", "CSAFPID-5589997", "CSAFPID-5589998", "CSAFPID-5589999", "CSAFPID-5590000", "CSAFPID-5590001", "CSAFPID-5590002", "CSAFPID-5590003", "CSAFPID-5590004", "CSAFPID-5590005", "CSAFPID-5590007", "CSAFPID-5590008", "CSAFPID-5590009", "CSAFPID-5590010" ] }, { "category": "exploit_status", "details": "exploited" } ], "title": "CVE-2026-21247" } ] }