Coverage › CVE-2025-53521
CVE-2025-53521 Unmapped
F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
- Vendor / product
- F5 — BIG-IP
- Description (CISA)
- F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
- Added to KEV
- 2026-03-27 — after the latest CTID mapping snapshot (2025-07-28)
- Due date
- 2026-03-30
- 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.
- Known ransomware use
- Unknown
- CWE
- CWE-121
- CISA 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 - Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2025-53521. This entry was added to KEV on 2026-03-27, after that snapshot; of the 283 entries added since, 0 have a mapping. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-121) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.