CVE-2025-55669

BIG-IP HTTP/2 vulnerability

Published Oct 15, 2025 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared F5 big-ip Application Security Manager
CPEs cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
Vendors & Products F5 big-ip Application Security Manager
Type Values Removed Values Added
First Time appeared F5
F5 big-ip
Vendors & Products F5
F5 big-ip
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title BIG-IP HTTP/2 vulnerability
Weaknesses CWE-672
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
f5
Published
Updated
Feb 26, 2026, 4:57 PM
Reserved
Oct 3, 2025, 11:04 PM
Status
Analyzed
Published
Oct 15, 2025, 2:15 PM
Modified
Oct 8, 2026, 12:10 PM