Exploited CVEs / By vendor / F5
F5 vulnerabilities actively exploited
7 F5 CVEs on the CISA Known Exploited Vulnerabilities catalog, newest first. Refreshed daily.
Every CVE below is confirmed exploited in the wild, not just theoretically severe. The newest addition is CVE-2025-53521 (BIG-IP, added 2026-03-27). 4 of the 7 are used in ransomware campaigns. New CISA KEV entries appear here the day they are cataloged; the freshest across all vendors are on exploited this week.
Senserva AI Opinion and rich prompt for F5 exploited CVEs
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
BIG-IP: 3 exploited CVEs
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2025-53521 | BIG-IP | 2026-03-27 | CVSS 9.8, EPSS 2% |
| CVE-2022-1388 | BIG-IP | 2022-05-10 | ransomware, CVSS 9.8, EPSS 100% |
| CVE-2020-5902 | BIG-IP | 2021-11-03 | ransomware, CVSS 9.8, EPSS 100% |
Other F5 products
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2023-46747 | BIG-IP Configuration Utility | 2023-10-31 | ransomware, CVSS 9.8, EPSS 97% |
| CVE-2023-46748 | BIG-IP Configuration Utility | 2023-10-31 | CVSS 8.8, EPSS 4% |
| CVE-2021-22991 | BIG-IP Traffic Management Microkernel | 2022-01-18 | CVSS 9.8, EPSS 61% |
| CVE-2021-22986 | BIG-IP and BIG-IQ Centralized Management | 2021-11-03 | ransomware, CVSS 9.8, EPSS 100% |
Common questions about exploited F5 CVEs
Which F5 vulnerabilities are actively exploited?
As of August 2026, 7 F5 CVEs are on the CISA Known Exploited Vulnerabilities catalog, meaning exploitation in the wild is confirmed. The most-listed products are BIG-IP (3). 4 are linked to ransomware campaigns.
What is the newest exploited F5 CVE?
CVE-2025-53521, affecting BIG-IP, added to the CISA KEV catalog on 2026-03-27. This page refreshes daily, so the newest entry is always first in the table.
How urgent are these F5 CVEs?
KEV listing is the strongest fix-first signal there is: it means confirmed exploitation, not a prediction. Patch these ahead of higher-CVSS issues that nobody is exploiting. Check the vendor advisory (linked below) for fixed versions and workarounds.
Can I ask my own AI about exploited F5 CVEs?
Yes. This page includes a free copy-paste AI prompt carrying the newest F5 KEV entries, with CVSS, EPSS, and ransomware context, into Claude, ChatGPT, or Copilot. The data is refreshed twice a day (5 AM and 3 PM US Central).
Authoritative references
All vendors, searchable with due dates and CSV export: the exploited-CVE tracker. Every vendor with a page: exploited by vendor.