CVE-2025-53521 — F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
2026-03-27 • CISA Known Exploited Vulnerability
[event] F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | F5 |
| Product | BIG-IP |
| CWE | CWE-121 |
| CVE ID | CVE-2025-53521 |
| Date Added | 2026-03-27 |
| Due Date | 2026-03-30 |
| Ransomware Campaign | Unknown |
> MITIGATION
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2026-03-30