{ "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-2026-56155", "tracking": { "current_release_date": "2026-07-14T20:03:47.452703Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-56155", "initial_release_date": "2026-07-14T08:49:28.924039Z", "revision_history": [ { "date": "2026-07-14T08:49:28.924039Z", "number": "1", "summary": "NCSC Score created." }, { "date": "2026-07-14T17:42:27.337793Z", "number": "2", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-07-14T17:42:30.110361Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-07-14T17:48:24.589222Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (13).| References created (1).| CWES updated (1)." }, { "date": "2026-07-14T17:48:27.502623Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-07-14T18:07:28.650799Z", "number": "6", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-07-14T18:07:30.420666Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-07-14T18:11:45.513717Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (15).| Product Threats created (30).| Product Remediations created (15).| CWES updated (1).| Exploitable created." }, { "date": "2026-07-14T18:15:42.247338Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-07-14T19:07:35.417772Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| Products created (1).| Exploits created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-07-14T19:07:38.253609Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-07-14T20:03:45.242382Z", "number": "12", "summary": "References created (1).| Unknown change." } ], "status": "interim", "version": "12" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-8809411" } } ], "category": "product_name", "name": "Active Directory Federation Services" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.14393.0|<10.0.14393.9339", "product": { "name": "vers:unknown/10.0.14393.0|<10.0.14393.9339", "product_id": "CSAFPID-8808547" } } ], "category": "product_name", "name": "Windows 10 Version 1607" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.14393.9339", "product": { "name": "vers:microsoft/10.0.14393.9339", "product_id": "CSAFPID-8808786", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.9339:*:*:*:*:*:x86:*" } } } ], "category": "product_name", "name": "Windows 10 Version 1607 for 32-bit Systems" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.14393.9339", "product": { "name": "vers:microsoft/10.0.14393.9339", "product_id": "CSAFPID-8808787", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.9339:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "Windows 10 Version 1607 for x64-based Systems" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.17763.9020", "product": { "name": "vers:microsoft/10.0.17763.9020", "product_id": "CSAFPID-8808767", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.9020:*:*:*:*:*:x86:*" } } } ], "category": "product_name", "name": "Windows 10 Version 1809 for 32-bit Systems" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.17763.9020", "product": { "name": "vers:microsoft/10.0.17763.9020", "product_id": "CSAFPID-8808768", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.9020:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "Windows 10 Version 1809 for x64-based Systems" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.14393.9339", "product": { "name": "vers:microsoft/10.0.14393.9339", "product_id": "CSAFPID-8808788", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.9339:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2016" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.14393.9339", "product": { "name": "vers:microsoft/10.0.14393.9339", "product_id": "CSAFPID-8808789", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.9339:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2016 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.17763.9020", "product": { "name": "vers:microsoft/10.0.17763.9020", "product_id": "CSAFPID-8808769", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.9020:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2019" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.17763.9020", "product": { "name": "vers:microsoft/10.0.17763.9020", "product_id": "CSAFPID-8808770", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.9020:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2019 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.20348.5386", "product": { "name": "vers:microsoft/10.0.20348.5386", "product_id": "CSAFPID-8808771", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.5386:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2022" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.26100.33158", "product": { "name": "vers:microsoft/10.0.26100.33158", "product_id": "CSAFPID-8808785", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2025:10.0.26100.33158:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2025" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/10.0.26100.33158", "product": { "name": "vers:microsoft/10.0.26100.33158", "product_id": "CSAFPID-8808778", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2025:10.0.26100.33158:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Windows Server 2025 (Server Core installation)" } ], "category": "product_family", "name": "Windows" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.17763.0|<10.0.17763.9020", "product": { "name": "vers:unknown/10.0.17763.0|<10.0.17763.9020", "product_id": "CSAFPID-8808548" } } ], "category": "product_name", "name": "Windows 10 Version 1809" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/6.2.9200.26226", "product": { "name": "vers:microsoft/6.2.9200.26226", "product_id": "CSAFPID-8808790", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.26226:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "Windows Server 2012" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/6.2.9200.26226", "product": { "name": "vers:microsoft/6.2.9200.26226", "product_id": "CSAFPID-8808791", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.26226:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "Windows Server 2012 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/6.3.9600.23291", "product": { "name": "vers:microsoft/6.3.9600.23291", "product_id": "CSAFPID-8808792", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.23291:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "Windows Server 2012 R2" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/6.3.9600.23291", "product": { "name": "vers:microsoft/6.3.9600.23291", "product_id": "CSAFPID-8808793", "product_identification_helper": { "cpe": "cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.23291:*:*:*:*:*:x64:*" } } } ], "category": "product_name", "name": "Windows Server 2012 R2 (Server Core installation)" } ], "category": "product_family", "name": "ESU" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/6.2.9200.0|<6.2.9200.26226", "product": { "name": "vers:unknown/6.2.9200.0|<6.2.9200.26226", "product_id": "CSAFPID-8808555" } } ], "category": "product_name", "name": "Windows Server 2012" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/6.2.9200.0|<6.2.9200.26226", "product": { "name": "vers:unknown/6.2.9200.0|<6.2.9200.26226", "product_id": "CSAFPID-8808556" } } ], "category": "product_name", "name": "Windows Server 2012 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/6.3.9600.0|<6.3.9600.23291", "product": { "name": "vers:unknown/6.3.9600.0|<6.3.9600.23291", "product_id": "CSAFPID-8808557" } } ], "category": "product_name", "name": "Windows Server 2012 R2" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/6.3.9600.0|<6.3.9600.23291", "product": { "name": "vers:unknown/6.3.9600.0|<6.3.9600.23291", "product_id": "CSAFPID-8808558" } } ], "category": "product_name", "name": "Windows Server 2012 R2 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.14393.0|<10.0.14393.9339", "product": { "name": "vers:unknown/10.0.14393.0|<10.0.14393.9339", "product_id": "CSAFPID-8808559" } } ], "category": "product_name", "name": "Windows Server 2016" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.14393.0|<10.0.14393.9339", "product": { "name": "vers:unknown/10.0.14393.0|<10.0.14393.9339", "product_id": "CSAFPID-8808560" } } ], "category": "product_name", "name": "Windows Server 2016 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.17763.0|<10.0.17763.9020", "product": { "name": "vers:unknown/10.0.17763.0|<10.0.17763.9020", "product_id": "CSAFPID-8808561" } } ], "category": "product_name", "name": "Windows Server 2019" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.17763.0|<10.0.17763.9020", "product": { "name": "vers:unknown/10.0.17763.0|<10.0.17763.9020", "product_id": "CSAFPID-8808562" } } ], "category": "product_name", "name": "Windows Server 2019 (Server Core installation)" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.20348.0|<10.0.20348.5386", "product": { "name": "vers:unknown/10.0.20348.0|<10.0.20348.5386", "product_id": "CSAFPID-8808563" } } ], "category": "product_name", "name": "Windows Server 2022" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.26100.0|<10.0.26100.33158", "product": { "name": "vers:unknown/10.0.26100.0|<10.0.26100.33158", "product_id": "CSAFPID-8808564" } } ], "category": "product_name", "name": "Windows Server 2025" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0.26100.0|<10.0.26100.33158", "product": { "name": "vers:unknown/10.0.26100.0|<10.0.26100.33158", "product_id": "CSAFPID-8808565" } } ], "category": "product_name", "name": "Windows Server 2025 (Server Core installation)" } ], "category": "vendor", "name": "Microsoft" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-56155", "cwe": { "id": "CWE-1220", "name": "Insufficient Granularity of Access Control" }, "notes": [ { "category": "description", "text": "Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56155" }, { "category": "description", "text": "Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/56xxx/CVE-2026-56155.json" }, { "category": "description", "text": "

Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.

\n", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Jul" }, { "category": "description", "text": "Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.\nApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "title": "cisagov - https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" }, { "category": "other", "text": "7.0", "title": "NCSC Score" }, { "category": "other", "text": "VENDOR FIX as product remediation category, There is news data available from source Bleepingcomputer, Is related to (a version of) product Windows Version", "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-8808547", "CSAFPID-8808548", "CSAFPID-8808555", "CSAFPID-8808556", "CSAFPID-8808557", "CSAFPID-8808558", "CSAFPID-8808559", "CSAFPID-8808560", "CSAFPID-8808561", "CSAFPID-8808562", "CSAFPID-8808563", "CSAFPID-8808564", "CSAFPID-8808565", "CSAFPID-8808767", "CSAFPID-8808768", "CSAFPID-8808769", "CSAFPID-8808770", "CSAFPID-8808771", "CSAFPID-8808778", "CSAFPID-8808785", "CSAFPID-8808786", "CSAFPID-8808787", "CSAFPID-8808788", "CSAFPID-8808789", "CSAFPID-8808790", "CSAFPID-8808791", "CSAFPID-8808792", "CSAFPID-8808793", "CSAFPID-8809411" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/56xxx/CVE-2026-56155.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56155" }, { "category": "external", "summary": "Source - cisagov", "url": "https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-july-2026-patch-tuesday-fixes-massive-570-flaws-3-zero-days/" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Jul" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0231" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-july-2026-patch-tuesday-fixes-massive-570-flaws-3-zero-days/" }, { "category": "external", "summary": "Reference - cisagov", "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155" }, { "category": "external", "summary": "Reference - cisagov", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56155" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155" }, { "category": "external", "summary": "Reference - cveprojectv5", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155" } ], "remediations": [ { "category": "vendor_fix", "details": "5099538", "product_ids": [ "CSAFPID-8808767", "CSAFPID-8808768", "CSAFPID-8808769", "CSAFPID-8808770" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5099538" }, { "category": "vendor_fix", "details": "5099540", "product_ids": [ "CSAFPID-8808771" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5099540" }, { "category": "vendor_fix", "details": "5099536", "product_ids": [ "CSAFPID-8808778", "CSAFPID-8808785" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5099536" }, { "category": "vendor_fix", "details": "5099535", "product_ids": [ "CSAFPID-8808786", "CSAFPID-8808787", "CSAFPID-8808788", "CSAFPID-8808789" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5099535" }, { "category": "vendor_fix", "details": "5099445", "product_ids": [ "CSAFPID-8808790", "CSAFPID-8808791" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5099445" }, { "category": "vendor_fix", "details": "5099444", "product_ids": [ "CSAFPID-8808792", "CSAFPID-8808793" ], "url": "https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5099444" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C", "baseScore": 7.8, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-8808547", "CSAFPID-8808548", "CSAFPID-8808555", "CSAFPID-8808556", "CSAFPID-8808557", "CSAFPID-8808558", "CSAFPID-8808559", "CSAFPID-8808560", "CSAFPID-8808561", "CSAFPID-8808562", "CSAFPID-8808563", "CSAFPID-8808564", "CSAFPID-8808565", "CSAFPID-8808767", "CSAFPID-8808768", "CSAFPID-8808769", "CSAFPID-8808770", "CSAFPID-8808771", "CSAFPID-8808778", "CSAFPID-8808785", "CSAFPID-8808786", "CSAFPID-8808787", "CSAFPID-8808788", "CSAFPID-8808789", "CSAFPID-8808790", "CSAFPID-8808791", "CSAFPID-8808792", "CSAFPID-8808793", "CSAFPID-8809411" ] } ], "threats": [ { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:Yes;Latest Software Release:Exploitation Detected", "product_ids": [ "CSAFPID-8808767", "CSAFPID-8808768", "CSAFPID-8808769", "CSAFPID-8808770", "CSAFPID-8808771", "CSAFPID-8808778", "CSAFPID-8808785", "CSAFPID-8808786", "CSAFPID-8808787", "CSAFPID-8808788", "CSAFPID-8808789", "CSAFPID-8808790", "CSAFPID-8808791", "CSAFPID-8808792", "CSAFPID-8808793" ] }, { "category": "impact", "details": "Elevation of Privilege", "product_ids": [ "CSAFPID-8808767", "CSAFPID-8808768", "CSAFPID-8808769", "CSAFPID-8808770", "CSAFPID-8808771", "CSAFPID-8808778", "CSAFPID-8808785", "CSAFPID-8808786", "CSAFPID-8808787", "CSAFPID-8808788", "CSAFPID-8808789", "CSAFPID-8808790", "CSAFPID-8808791", "CSAFPID-8808792", "CSAFPID-8808793" ] }, { "category": "exploit_status", "details": "exploited" } ], "title": "CVE-2026-56155" } ] }