What is CVE-2025-55669?

CVE-2025-55669 is a high-severity vulnerability in F5 Big-ip, classified under Operation on a Resource after Expiration or Release. CVSS score: 7.5/10. Published 2025-10-15.

How severe is CVE-2025-55669?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in F5 Big-ip

CVE-2025-55669

When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which h…

EPSS: 0.003 (55.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

F5 Big-ip — versions 17.5.0, 17.1.0, 16.1.0

Weakness classification (CWE)

CWE-672 — Operation on a Resource after Expiration or Release

References

my.f5.com/manage/s/article/K000150752 (vendor-advisory)

Frequently asked questions

What is CVE-2025-55669?: CVE-2025-55669 is a high-severity vulnerability in F5 Big-ip, classified under Operation on a Resource after Expiration or Release. CVSS score: 7.5/10. Published 2025-10-15.
How severe is CVE-2025-55669?: High severity. CVSS v3 base score is 7.5 out of 10.