{"uuid": "b763a4a0-b169-4d67-95be-696d86f4bc76", "vulnerability": {"vulnId": "CVE-2021-22991", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "b763a4a0-b169-4d67-95be-696d86f4bc76"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2022-01-18T00:00:00+00:00"}, "characteristics": {}, "timestamps": {"asserted_at": "2022-01-18T00:00:00Z", "recorded_at": "2026-02-02T13:24:01Z", "first_seen_at": "2022-01-18T00:00:00Z"}, "scope": {"notes": "KEV entry: F5 BIG-IP Traffic Management Microkernel Buffer Overflow | Affected: F5 / BIG-IP Traffic Management Microkernel | Description: The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls. | Required action: Apply updates per vendor instructions. | Due date: 2022-02-01 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-22991"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-119"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "BIG-IP Traffic Management Microkernel", "due_date": "2022-02-01", "date_added": "2022-01-18", "vendorProject": "F5", "vulnerabilityName": "F5 BIG-IP Traffic Management Microkernel Buffer Overflow", "knownRansomwareCampaignUse": "Unknown"}}], "references": [{"id": "CVE-2021-22991", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-22991"}]}