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 have reached End of Technical Support (EoTS) are not evaluated.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (29.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- F5 Big-Ip — versions 17.5.0, 17.1.0, 16.1.0
- F5 Big-Ip Application Security Manager
Weakness classification (CWE)
References
- my.f5.com/manage/s/article/K000150752 (vendor-advisory, 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.