Coverage › CVE-2021-22991
CVE-2021-22991 Unmapped
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
- Vendor / product
- F5 — BIG-IP Traffic Management Microkernel
- Description (CISA)
- The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.
- Added to KEV
- 2022-01-18
- Due date
- 2022-02-01
- Required action
- Apply updates per vendor instructions.
- Known ransomware use
- Unknown
- CWE
- CWE-119
- CISA notes
- https://nvd.nist.gov/vuln/detail/CVE-2021-22991
- Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2021-22991. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-119) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.