{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2025-53521 in the wild since at least 27 Mar 2026.","fix":"No fix has been published for CVE-2025-53521 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 30 Mar 2026.","what":"CVE-2025-53521 is a critical memory corruption vulnerability in F5 Big-Ip Access Policy Manager, published on 15 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-53521 and fix it if it is affected.\n\nWhat it is: CVE-2025-53521 is a critical memory corruption vulnerability in F5 Big-Ip Access Policy Manager, published on 15 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2025-53521 in the wild since at least 27 Mar 2026.\n\nAffected product: F5 Big-Ip Access Policy Manager. 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-2025-53521/ (Markdown: https://insights.sbomify.com/CVE-2025-53521/index.md)","id":"CVE-2025-53521","markdown":"https://insights.sbomify.com/CVE-2025-53521/index.md","name":"CVE-2025-53521","record":{"aliases":["GHSA-j3cp-7wh4-9f6c"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"F5 BIG-IP APM","requires_auth":"none","summary":"Attackers can achieve remote code execution on F5 BIG-IP devices by sending malicious traffic to a configured APM access policy.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"f5","cpe":[{"product":"big-ip_access_policy_manager","vendor":"f5"}],"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:N","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).  \n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"exploited"},"has_fix":null,"headline":"F5 BIG-IP Stack-Based Buffer Overflow","id":"CVE-2025-53521","indexable":true,"kev":{"dateAdded":"2026-03-27","dueDate":"2026-03-30","knownRansomwareCampaignUse":"Unknown","product":"BIG-IP","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","vendorProject":"F5","vulnerabilityName":"F5 BIG-IP Stack-Based Buffer Overflow Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"f5:big-ip_access_policy_manager","products":["f5:big-ip_access_policy_manager"],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Other in Movable Type (Cloud Edition)","id":"CVE-2025-53522"},"packages":[],"prev":{"headline":"EG4 Electronics EG4 Inverters Download of Code Without Integrity Check","id":"CVE-2025-53520"},"products":["BIG-IP"],"published":"2025-10-15","related":[{"cvss_score":9.8,"headline":"F5 BIG-IP Configuration Utility Authentication Bypass","id":"CVE-2023-46747","kev_date_added":"2023-10-31","published":"2023-10-26"},{"cvss_score":9.8,"headline":"F5 BIG-IP Missing Authentication","id":"CVE-2022-1388","kev_date_added":"2022-05-10","published":"2022-05-05"},{"cvss_score":9.8,"headline":"F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution","id":"CVE-2021-22986","kev_date_added":"2021-11-03","published":"2021-03-31"},{"cvss_score":9.8,"headline":"F5 BIG-IP Traffic Management Microkernel Buffer Overflow","id":"CVE-2021-22991","kev_date_added":"2022-01-18","published":"2021-03-31"},{"cvss_score":9.8,"headline":"F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution","id":"CVE-2020-5902","kev_date_added":"2021-11-03","published":"2020-07-01"},{"cvss_score":9.3,"headline":"F5 BIG-IP APM Heap-based Buffer Overflow","id":"CVE-2026-94127","kev_date_added":"2026-09-22","published":"2026-09-22"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-31","vendors":["F5"]},"summary":"Attackers can achieve remote code execution on F5 BIG-IP devices by sending malicious traffic to a configured APM access policy.","url":"https://insights.sbomify.com/CVE-2025-53521/"}