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.

7 exploited CVEs4 ransomware-linked

Ask your own AI about F5 exploited CVEs

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

BIG-IP: 3 exploited CVEs

CVEProductAdded to KEVSignals
CVE-2025-53521BIG-IP2026-03-27CVSS 9.8, EPSS 2%
CVE-2022-1388BIG-IP2022-05-10ransomware, CVSS 9.8, EPSS 100%
CVE-2020-5902BIG-IP2021-11-03ransomware, CVSS 9.8, EPSS 100%

Other F5 products

CVEProductAdded to KEVSignals
CVE-2023-46747BIG-IP Configuration Utility2023-10-31ransomware, CVSS 9.8, EPSS 97%
CVE-2023-46748BIG-IP Configuration Utility2023-10-31CVSS 8.8, EPSS 4%
CVE-2021-22991BIG-IP Traffic Management Microkernel2022-01-18CVSS 9.8, EPSS 61%
CVE-2021-22986BIG-IP and BIG-IQ Centralized Management2021-11-03ransomware, CVSS 9.8, EPSS 100%

Common questions about exploited F5 CVEs

Which F5 vulnerabilities are actively exploited?

As of July 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 daily.

Authoritative references

CISA Known Exploited Vulnerabilities CatalogNIST National Vulnerability DatabaseFIRST.org EPSS

All vendors, searchable with due dates and CSV export: the exploited-CVE tracker. Every vendor with a page: exploited by vendor.

Sponsored by SenservaMicrosoft 365, Intune, Defender, and Entra ID security and compliance, with automated remediation and Trustworthy AI.Scan free
Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.
Reference: the Microsoft patching guide, how Intune, Windows Autopatch, Defender, and Azure Update Manager fit together.
Data notice: this page, the feeds, and the API are provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative vendor advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.