Product · KEV exposure
F5 BIG-IP known exploited vulnerabilities
We track 3 CVEs in F5 BIG-IP. All of them are on CISA's Known Exploited Vulnerabilities catalog, meaning CISA has evidence of exploitation in the wild (listed 2021–2026). CISA flags 2 of them as used in ransomware campaigns. The most recent is CVE-2025-53521, added to KEV on .
- CVEs tracked
- 3
- On CISA KEV
- 3
- Ransomware use
- 2
- Rated critical
- 3
Every F5 BIG-IP CVE we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV | Patch by |
|---|---|---|---|---|---|
| CVE-2025-53521 F5 BIG-IP Stack-Based Buffer Overflow Vulnerability | [ CRITICAL ] | 9.8 | 2.3% | ||
| CVE-2022-1388 F5 BIG-IP iControl REST Authentication Bypassransomware usewrite-up | [ CRITICAL ] | 9.8 | 100.0% | ||
| CVE-2020-5902 F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 100.0% |
Sorted by date added to KEV. Severity and CVSS as stated by NVD or the vendor; EPSS from FIRST.org. "Patch by" is CISA's BOD 22-01 deadline for US federal agencies, a useful priority signal for everyone else. Machine-readable: /api/v1/vendors/f5.json.
Every row links to its CVE record with the CISA required action, catalog coverage and primary sources. We describe impact and remediation only; no exploit code. See the full KEV tracker or compare KEV catalogs.