F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
F5 — BIG-IP
- Added to KEV catalog
- 27 March 2026
- Federal remediation due date
- 30 March 2026
- Weakness classification (CWE)
- CWE-121
CISA Description
F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
Please adhere to F5’s guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible F5 products affected by this vulnerability. For more information please see: https://my.f5.com/manage/s/article/K000156741 ; https://my.f5.com/manage/s/article/K000160486 ; https://my.f5.com/manage/s/article/K11438344 ; https://nvd.nist.gov/vuln/detail/CVE-2025-53521
More F5 Vulnerabilities
F5 BIG-IP Configuration Utility SQL Injection Vulnerability
F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability
F5 BIG-IP Missing Authentication Vulnerability
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability
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