CVE-2021-22991
CISA KEVPublished January 18, 2022 · Updated April 3, 2026
high
Official 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.
Affected Products
| Vendor | Product |
|---|---|
| F5 | BIG-IP Traffic Management Microkernel |
Patch Status
Patch by 2022-02-01
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2021-22991.