{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21902 exists.","fix":"No fix has been published for CVE-2026-21902 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-21902 is a critical missing authorization vulnerability in Juniper Junos Os Evolved, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-21902 and fix it if it is affected.\n\nWhat it is: CVE-2026-21902 is a critical missing authorization vulnerability in Juniper Junos Os Evolved, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21902 exists.\n\nAffected product: Juniper Junos Os Evolved. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-21902/ (Markdown: https://insights.sbomify.com/CVE-2026-21902/index.md)","id":"CVE-2026-21902","markdown":"https://insights.sbomify.com/CVE-2026-21902/index.md","name":"CVE-2026-21902","record":{"aliases":["GHSA-5w57-gjvc-whwc"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Juniper PTX router","requires_auth":"none","summary":"Unauthenticated remote attackers can execute code as root on Juniper PTX routers due to improper permission assignment in the anomaly detection framework.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"juniper","cpe":[{"product":"junos_os_evolved","vendor":"juniper"}],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-732","name":"Incorrect Permission Assignment for Critical Resource"}],"description":"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  *  25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.\n\nThis issue does not affect Junos OS Evolved versions before 25.4R1-EVO.\n\nThis issue does not affect Junos OS.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-02-28","github_poc":1,"max_poc_stars":4,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-02-28T10:43:32Z","kind":"github_poc","ref":"https://github.com/watchtowrlabs/watchTowr-vs-JunosEvolved-CVE-2026-21902","stars":4,"title":null}],"tier":"weaponised"},"has_fix":null,"headline":"Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root","id":"CVE-2026-21902","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"juniper:junos_os_evolved","products":["juniper:junos_os_evolved"],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Junos OS: Subscribing to telemetry sensors at scale causes all FPCs to crash","id":"CVE-2026-21903"},"packages":[],"prev":{"headline":"Junos OS and Junos OS Evolved: Configuration of a specific SSH option results in mgd crash","id":"CVE-2026-21901"},"products":["Junos OS Evolved"],"published":"2026-02-25","related":[{"cvss_score":8.8,"headline":"Junos OS Evolved: Shell Injection vulnerability in the gNOI server","id":"CVE-2023-28983","kev_date_added":null,"published":"2023-04-17"},{"cvss_score":8.7,"headline":"Denial of service in Junos OS Evolved","id":"CVE-2025-21599","kev_date_added":null,"published":"2025-01-09"},{"cvss_score":8.7,"headline":"Junos OS Evolved: TCP session state is not always cleared on the Routing Engine leading to DoS","id":"CVE-2024-47502","kev_date_added":null,"published":"2024-10-11"},{"cvss_score":8.7,"headline":"Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other protocols","id":"CVE-2024-39531","kev_date_added":null,"published":"2024-07-11"},{"cvss_score":8.7,"headline":"Junos OS Evolved: A high rate of SSH connections causes a Denial of Service","id":"CVE-2024-39562","kev_date_added":null,"published":"2024-07-10"},{"cvss_score":8.5,"headline":"Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs","id":"CVE-2026-33788","kev_date_added":null,"published":"2026-04-09"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-04","vendors":["Juniper Networks"]},"summary":"Unauthenticated remote attackers can execute code as root on Juniper PTX routers due to improper permission assignment in the anomaly detection framework.","url":"https://insights.sbomify.com/CVE-2026-21902/"}