CVE-2025-53521
F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
9.8
CVSS
2.2%
EPSS (exploit prob.)
80.8%
EPSS percentile
Yes
Actively exploited
No
Ransomware use
2026-03-27
Added
Summary
F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
Affected software
Vendor: F5 · Product: BIG-IP
Weakness types (CWE):
CWE-121
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-2021-22991 | F5 BIG-IP Traffic Management Microkernel Buffer Overflow | 61.1% | Yes |
| CVE-2023-46748 | F5 BIG-IP Configuration Utility SQL Injection Vulnerability | 4.5% | Yes |
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