{ "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-2026-21902", "tracking": { "current_release_date": "2026-03-30T15:26:32.716331Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-21902", "initial_release_date": "2026-02-25T17:38:32.150139Z", "revision_history": [ { "date": "2026-02-25T17:38:32.150139Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| References created (2).| CWES updated (1)." }, { "date": "2026-02-25T17:38:39.058881Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-02-25T18:30:26.252795Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-02-25T18:30:29.216165Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-02-25T18:38:55.786077Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| Product Remediations created (1).| Vendor_assessment created." }, { "date": "2026-02-25T18:39:06.591069Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-02-25T20:21:00.679640Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-02-26T12:05:47.711325Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Products created (2).| References created (3)." }, { "date": "2026-02-26T12:06:02.669172Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-02-26T14:14:56.143924Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-26T14:15:13.966453Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-02-26T17:04:39.355892Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| News created (1)." }, { "date": "2026-02-26T17:04:44.927921Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-02-27T02:41:32.558026Z", "number": "14", "summary": "Source created.| CVE status created. (valid)" }, { "date": "2026-02-27T09:49:02.789432Z", "number": "15", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-02-27T11:30:39.993547Z", "number": "16", "summary": "Source created.| CVE status created. (valid)| News created (1)." }, { "date": "2026-02-27T11:30:48.956691Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-02-27T17:18:43.371672Z", "number": "18", "summary": "NCSC Score updated." }, { "date": "2026-02-28T19:27:12.856441Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-03-03T12:38:55.999400Z", "number": "20", "summary": "Products created (4).| Product Remediations created (1).| Products removed (2)." }, { "date": "2026-03-03T12:39:07.633688Z", "number": "21", "summary": "NCSC Score updated." }, { "date": "2026-03-03T15:25:38.686318Z", "number": "22", "summary": "References created (1)." }, { "date": "2026-03-03T15:39:19.174912Z", "number": "23", "summary": "Exploits created (1).| Unknown change." }, { "date": "2026-03-03T15:39:21.440193Z", "number": "24", "summary": "NCSC Score updated." }, { "date": "2026-03-04T08:05:32.271676Z", "number": "25", "summary": "References created (1)." }, { "date": "2026-03-04T08:05:38.682732Z", "number": "26", "summary": "NCSC Score updated." }, { "date": "2026-03-11T17:15:55.481454Z", "number": "27", "summary": "NCSC Score updated." }, { "date": "2026-03-20T10:02:36.545220Z", "number": "28", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T10:02:39.124242Z", "number": "29", "summary": "NCSC Score updated." }, { "date": "2026-03-26T12:25:32.525625Z", "number": "30", "summary": "NCSC Score updated." }, { "date": "2026-03-30T15:25:21.870872Z", "number": "31", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| Product Identifiers created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-30T15:25:23.787243Z", "number": "32", "summary": "NCSC Score updated." } ], "status": "interim", "version": "32" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/evolved <25.4r1-s1-evo", "product": { "name": "vers:unknown/evolved <25.4r1-s1-evo", "product_id": "CSAFPID-5729797" } }, { "category": "product_version_range", "name": "vers:unknown/evolved <25.4r2-evo", "product": { "name": "vers:unknown/evolved <25.4r2-evo", "product_id": "CSAFPID-5729798" } } ], "category": "product_name", "name": "JUNOS" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/25.4-r1", "product": { "name": "vers:unknown/25.4-r1", "product_id": "CSAFPID-5965371", "product_identification_helper": { "cpe": "cpe:2.3:o:juniper:junos_os_evolved:25.4:r1:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "junos_os_evolved" } ], "category": "vendor", "name": "Juniper" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/25.4|<25.4r1-s1-evo,25.4r2-evo", "product": { "name": "vers:semver/25.4|<25.4r1-s1-evo,25.4r2-evo", "product_id": "CSAFPID-5706537" } }, { "category": "product_version_range", "name": "vers:semver/<25.4r1-evo", "product": { "name": "vers:semver/<25.4r1-evo", "product_id": "CSAFPID-5706538" } }, { "category": "product_version_range", "name": "vers:unknown/25.4r1-s1-evo", "product": { "name": "vers:unknown/25.4r1-s1-evo", "product_id": "CSAFPID-5755917" } }, { "category": "product_version_range", "name": "vers:unknown/25.4r2-evo", "product": { "name": "vers:unknown/25.4r2-evo", "product_id": "CSAFPID-5755918" } }, { "category": "product_version_range", "name": "vers:unknown/26.2r1-evo", "product": { "name": "vers:unknown/26.2r1-evo", "product_id": "CSAFPID-5755919" } }, { "category": "product_version_range", "name": "vers:unknown/<25.4r1-s1-evo|<=25.4r2-evo", "product": { "name": "vers:unknown/<25.4r1-s1-evo|<=25.4r2-evo", "product_id": "CSAFPID-5755916" } } ], "category": "product_name", "name": "Junos OS Evolved" } ], "category": "vendor", "name": "Juniper Networks" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-21902", "cwe": { "id": "CWE-732", "name": "Incorrect Permission Assignment for Critical Resource" }, "notes": [ { "category": "description", "text": "An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to execute code as root.\n\nThe On-Box Anomaly detection framework should only be reachable by other internal processes over the internal routing instance, but not over an externally exposed port. With the ability to access and manipulate the service to execute code as root a remote attacker can take complete control of the device.\nPlease note that this service is enabled by default as no specific configuration is required.\n\nThis issue affects Junos OS Evolved on PTX Series:\n\n\n\n * 25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.\n\n\n\n\nThis issue does not affect Junos OS Evolved versions before 25.4R1-EVO.\n\nThis issue does not affect Junos OS.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-21902" }, { "category": "description", "text": "An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to execute code as root.\n\nThe On-Box Anomaly detection framework should only be reachable by other internal processes over the internal routing instance, but not over an externally exposed port. With the ability to access and manipulate the service to execute code as root a remote attacker can take complete control of the device.\nPlease note that this service is enabled by default as no specific configuration is required.\n\nThis issue affects Junos OS Evolved on PTX Series:\n\n\n\n * 25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.\n\n\n\n\nThis issue does not affect Junos OS Evolved versions before 25.4R1-EVO.\n\nThis issue does not affect Junos OS.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-21902" }, { "category": "description", "text": "An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to execute code as root. The On-Box Anomaly detection framework should only be reachable by other internal processes over the internal routing instance, but not over an externally exposed port. With the ability to access and manipulate the service to execute code as root a remote attacker can take complete control of the device. Please note that this service is enabled by default as no specific configuration is required.", "title": "juniper - https://supportportal.juniper.net/s/article/2026-02-Out-of-Cycle-Security-Bulletin-Junos-OS-Evolved-PTX-Series-A-vulnerability-allows-a-unauthenticated-network-based-attacker-to-execute-code-as-root-CVE-2026-21902" }, { "category": "description", "text": "An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to execute code as root.\n\nThe On-Box Anomaly detection framework should only be reachable by other internal processes over the internal routing instance, but not over an externally exposed port. With the ability to access and manipulate the service to execute code as root a remote attacker can take complete control of the device.\nPlease note that this service is enabled by default as no specific configuration is required.\n\nThis issue affects Junos OS Evolved on PTX Series:\n\n\n\n * 25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.\n\n\n\n\nThis issue does not affect Junos OS Evolved versions before 25.4R1-EVO.\n\nThis issue does not affect Junos OS.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-21902" }, { "category": "other", "text": "0.00282", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M/U:Red", "title": "CVSSV4" }, { "category": "other", "text": "9.3", "title": "CVSSV4 base score" }, { "category": "other", "text": "6.3", "title": "NCSC Score" }, { "category": "other", "text": "There is news data available from source Bleepingcomputer, Is related to a product by vendor Juniper, There is product data available from source Certbundde, There is cvss data available from a private source, There is product data available from a private source, Is related to an uncommon product source", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is exploit data available from source Cveprojectv5, Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 4\n", "title": "Vendor assessment" } ], "product_status": { "fixed": [ "CSAFPID-5755917", "CSAFPID-5755918", "CSAFPID-5755919" ], "known_affected": [ "CSAFPID-5706537", "CSAFPID-5729797", "CSAFPID-5729798", "CSAFPID-5755916", "CSAFPID-5965371" ], "known_not_affected": [ "CSAFPID-5706538" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-21902" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21902.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21902" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-21902" }, { "category": "external", "summary": "Source - juniper", "url": "https://supportportal.juniper.net/s/article/2026-02-Out-of-Cycle-Security-Bulletin-Junos-OS-Evolved-PTX-Series-A-vulnerability-allows-a-unauthenticated-network-based-attacker-to-execute-code-as-root-CVE-2026-21902" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0535.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-21902" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/critical-juniper-networks-ptx-flaw-allows-full-router-takeover/" }, { "category": "external", "summary": "Source - hkcert", "url": "https://www.hkcert.org/security-bulletin/juniper-junos-os-remote-code-execution-vulnerability_20260227" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0073" }, { "category": "external", "summary": "Source - securityweek", "url": "https://www.securityweek.com/juniper-networks-ptx-routers-affected-by-critical-vulnerability/" }, { "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-2026-21902" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/critical-juniper-networks-ptx-flaw-allows-full-router-takeover/" }, { "category": "external", "summary": "News - securityweek", "url": "https://www.securityweek.com/juniper-networks-ptx-routers-affected-by-critical-vulnerability/" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://supportportal.juniper.net/JSA107128" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://kb.juniper.net/JSA107128" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0535.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0535" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://supportportal.juniper.net/s/article/2026-02-Out-of-Cycle-Security-Bulletin-Junos-OS-Evolved-PTX-Series-A-vulnerability-allows-a-unauthenticated-network-based-attacker-to-execute-code-as-root-CVE-2026-21902" }, { "category": "external", "summary": "Reference - nvd", "url": "https://github.com/watchtowrlabs/watchTowr-vs-JunosEvolved-CVE-2026-21902/blob/main/watchTowr-vs-JunosEvolved-CVE-2026-21902.py" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://labs.watchtowr.com/sometimes-you-can-just-feel-the-security-in-the-design-junos-os-evolved-cve-2026-21902-rce/" } ], "remediations": [ { "category": "workaround", "details": "To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks and hosts. Please ensure such filters only permit explicitly required connections and block all others. Alternatively, this service can be disabled by '`request pfe anomalies disable`'.", "product_ids": [ "CSAFPID-5755916" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-5706537", "CSAFPID-5729797", "CSAFPID-5729798", "CSAFPID-5755916", "CSAFPID-5965371" ] } ], "title": "CVE-2026-21902" } ] }