CVE-2021-22991
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.
Affected software
Vendor: F5 · Product: BIG-IP Traffic Management Microkernel
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in F5
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2020-5902 | F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnera | 100.0% | Yes |
| CVE-2022-1388 | F5 BIG-IP Missing Authentication Vulnerability | 100.0% | Yes |
| CVE-2021-22986 | F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution | 99.9% | Yes |
| CVE-2023-46747 | F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability | 96.5% | Yes |
| CVE-2023-46748 | F5 BIG-IP Configuration Utility SQL Injection Vulnerability | 4.5% | Yes |
| CVE-2025-53521 | F5 BIG-IP Stack-Based Buffer Overflow Vulnerability | 2.2% | Yes |
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