{"schema_version":"1","data":[{"id":2925,"advisory_id":"3723a897-b462-401f-bd9f-ba766d5fdace","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-22991","source_published_at":"2022-01-18T00:00:00+00:00","published_at":"2026-10-24T21:26:30.154945+00:00","extraction_method":"structured","technologies":["big-ip-traffic-management-microkernel","core-kev"],"cve_ids":["CVE-2021-22991"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"F5 BIG-IP Traffic Management Microkernel Buffer Overflow","summary":"The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-22991","products":[{"name":{"value":"BIG-IP Traffic Management Microkernel","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-22991","aliases":["CVE-2021-22991"],"affected":[],"modified":"2022-01-18T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-119"],"cveID":"CVE-2021-22991","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-22991","dueDate":"2022-02-01","product":"BIG-IP Traffic Management Microkernel","dateAdded":"2022-01-18","vendorProject":"F5","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.","vulnerabilityName":"F5 BIG-IP Traffic Management Microkernel Buffer Overflow","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2021-22991","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null},"priority":{"reasons":["known_exploited"],"severity":"unknown","linked_cves":[],"fix_available":false,"known_exploited":true,"publisher_severity":"unknown"},"context_update":false}],"next_after":2925,"next_before":2925}