What it is
F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor notices and references
- my.f5.com/manage/s/article/K000160486
- my.f5.com/manage/s/article/K11438344
- nvd.nist.gov/vuln/detail/CVE-2025-53521
Description and required action as published by CISA. Full record at NVD.
Other F5 entries on the list
- BIG-IP APM F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability CVE-2026-94127 · Sep 22, 2026
- BIG-IP Configuration Utility F5 BIG-IP Configuration Utility SQL Injection Vulnerability CVE-2023-46748 · Oct 31, 2023
- BIG-IP Configuration Utility F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability CVE-2023-46747 · Oct 31, 2023
- BIG-IP F5 BIG-IP Missing Authentication Vulnerability CVE-2022-1388 · May 10, 2022
- BIG-IP Traffic Management Microkernel F5 BIG-IP Traffic Management Microkernel Buffer Overflow CVE-2021-22991 · Jan 18, 2022
- BIG-IP and BIG-IQ Centralized Management F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability CVE-2021-22986 · Nov 3, 2021