CVE detail
CVE-2025-53521: F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
F5 · BIG-IP
- Date added (KEV)
- Mar 27, 2026
- CISA due date
- Mar 30, 2026
- Ransomware campaign use
- Unknown
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.
Scorifya interpretation
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Plain English
Technical detail
From CISA
F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
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
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SOC 2 compliance
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- https://my.f5.com/manage/s/article/K000156741Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521US Government Resource
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- CVE-2021-22991BIG-IP Traffic Management Microkernel, F5 BIG-IP Traffic Management Microkernel Buffer Overflow
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