CVE-2021-22991
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
CVSS
—
No CVSS
EPSS
61.1%
p99
KEV
YES
Jan 18, 2022
Exploit Today
80
0-100
Published: — · Last modified: —
61.1%EPSS · 30 days61.1%
2026-06-302026-07-16
Product
F5 / BIG-IP Traffic Management Microkernel
Vulnerability
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
Added to KEV
Jan 18, 2022
Remediate by
Feb 1, 2022
Known ransomware use
No
Summary 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.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-22991
No related CVEs by CWE or product.