How we count
Every figure on this page is a direct count of entries in CISA’s Known Exploited Vulnerabilities catalog attributed by CISA to F5 (KEV field vendorProject), refreshed daily. “Ransomware-linked” counts entries CISA marks as known to be used in ransomware campaigns; the remainder are “unknown” to CISA, not confirmed ransomware-free. A KEV listing means the vulnerability has been observed exploited in the wild. Snapshot as of 2026-08-31.
Exploited F5 vulnerabilities (CISA KEV)
| CVE | Product | Vulnerability | Added | |
|---|---|---|---|---|
| CVE-2025-53521 | BIG-IP | F5 BIG-IP Stack-Based Buffer Overflow Vulnerability | 2026-03-27 | |
| CVE-2023-46748 | BIG-IP Configuration Utility | F5 BIG-IP Configuration Utility SQL Injection Vulnerability | 2023-10-31 | |
| CVE-2023-46747 | BIG-IP Configuration Utility | F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability | 2023-10-31 | ransomware |
| CVE-2022-1388 | BIG-IP | F5 BIG-IP Missing Authentication Vulnerability | 2022-05-10 | ransomware |
| CVE-2021-22991 | BIG-IP Traffic Management Microkernel | F5 BIG-IP Traffic Management Microkernel Buffer Overflow | 2022-01-18 | |
| CVE-2020-5902 | BIG-IP | F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability | 2021-11-03 | ransomware |
| CVE-2021-22986 | BIG-IP and BIG-IQ Centralized Management | F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability | 2021-11-03 | ransomware |
← All vendors by exploited-vulnerability count
🤖 Generated by defend.network from the CISA KEV catalog. Counts are deterministic aggregates of official CISA data; verify individual advisories at the linked sources.