F5 BIG-IP vulnerabilities: known CVEs & security history
F5 · Infrastructure · 38 tracked CVEs · 1 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all F5 BIG-IP release lines — 38 in total, with 1 actively exploited in the wild. A CVE here doesn't mean your version is affected — check F5 BIG-IP's current status and the safe version to run.
Known F5 BIG-IP CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2023-44487⚡ exploited | high | 7.5 | 100% | 2023 |
| CVE-2026-41225 | critical | 9.1 | 0% | 2026 |
| CVE-2026-41957 | high | 8.8 | 1% | 2026 |
| CVE-2026-42930 | high | 8.7 | 1% | 2026 |
| CVE-2026-42924 | high | 8.7 | 0% | 2026 |
| CVE-2026-42406 | high | 8.7 | 0% | 2026 |
| CVE-2026-41953 | high | 8.7 | 0% | 2026 |
| CVE-2026-40698 | high | 8.7 | 0% | 2026 |
| CVE-2026-40631 | high | 8.7 | 0% | 2026 |
| CVE-2026-34176 | high | 8.7 | 1% | 2026 |
| CVE-2026-32673 | high | 8.7 | 0% | 2026 |
| CVE-2026-32643 | high | 8.7 | 0% | 2026 |
| CVE-2026-41217 | high | 7.9 | 0% | 2026 |
| CVE-2026-42920 | high | 7.5 | 0% | 2026 |
| CVE-2026-42409 | high | 7.5 | 0% | 2026 |
| CVE-2026-41956 | high | 7.5 | 0% | 2026 |
| CVE-2026-41218 | high | 7.5 | 0% | 2026 |
| CVE-2026-40629 | high | 7.5 | 0% | 2026 |
| CVE-2026-40618 | high | 7.5 | 0% | 2026 |
| CVE-2026-40423 | high | 7.5 | 0% | 2026 |
| CVE-2026-39458 | high | 7.5 | 0% | 2026 |
| CVE-2026-39455 | high | 7.5 | 0% | 2026 |
| CVE-2026-39459 | high | 7.2 | 0% | 2026 |
| CVE-2026-24464 | medium | 6.8 | 1% | 2026 |
| CVE-2026-42919 | medium | 6.7 | 0% | 2026 |
| CVE-2026-42781 | medium | 6.5 | 0% | 2026 |
| CVE-2026-41959 | medium | 6.5 | 0% | 2026 |
| CVE-2026-41219 | medium | 6.5 | 0% | 2026 |
| CVE-2026-40699 | medium | 6.5 | 0% | 2026 |
| CVE-2026-40462 | medium | 6.5 | 0% | 2026 |
| CVE-2026-35062 | medium | 6.5 | 0% | 2026 |
| CVE-2026-40703 | medium | 5.4 | 0% | 2026 |
| CVE-2026-40435 | medium | 5.3 | 0% | 2026 |
| CVE-2026-34019 | medium | 5.3 | 0% | 2026 |
| CVE-2026-42063 | medium | 4.9 | 0% | 2026 |
| CVE-2026-41954 | medium | 4.9 | 0% | 2026 |
| CVE-2026-42408 | medium | 4.4 | 0% | 2026 |
| CVE-2026-42058 | medium | 4.3 | 0% | 2026 |
Is my F5 BIG-IP version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your F5 BIG-IP version → · Monitor F5 BIG-IP for new CVEs →
F5 BIG-IP vulnerabilities — frequently asked
How many known vulnerabilities does F5 BIG-IP have?
IsItPatched tracks 38 CVEs for F5 BIG-IP, 1 of which is actively exploited (CISA KEV). 1 is critical-severity and 22 high-severity. These span every release line — what matters is whether the version you run is affected.
Does F5 BIG-IP have any actively-exploited vulnerabilities?
Yes — 1 F5 BIG-IP CVE is in CISA's Known Exploited Vulnerabilities catalog, meaning it is confirmed exploited in the wild. Patch it as a priority.
What is the most severe F5 BIG-IP vulnerability?
Among tracked issues, CVE-2023-44487 (HIGH, CVSS 7.5), which is actively exploited, ranks highest — a Uncontrolled resource consumption weakness.
Is F5 BIG-IP safe to use?
It depends on the version. The latest supported F5 BIG-IP release (21.1.0) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: F5 BIG-IP security status · F5 BIG-IP end-of-life · actively-exploited CVEs. Always verify against F5's advisories — see our disclaimer.