High severity · published Oct 15, 2025
CVE-2025-55669
BIG-IP HTTP/2 vulnerability
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
BIG-IP · F5
17.1.0 before 17.1.2.2; 16.1.0 before 16.1.6 · source: vendor
BA
Big-ip Application Security Manager · F5
16.1.0 before 16.1.6; 17.1.0 through 17.1.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55669
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-55669
Vendor Advisory
https://my.f5.com/manage/s/article/K000150752
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