High 7.5Published Oct 15, 2025

CVE-2025-55669BIG-IP HTTP/2 vulnerability

Updated under an hour ago (Oct 27, 2026, 5:00 AM ET)

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It affects F5 BIG-IP and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for F5 BIG-IP

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-672
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: f5
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

F5 BIG-IP f5:big_ip (from the name)	from 17.5.0 not affected; from 17.1.0 before 17.1.2.2; from 16.1.0 before 16.1.6; from 15.1.0 not affected	CNA record
f5 big-ip_application_security_manager f5:big-ip_application_security_manager	from 16.1.0 before 16.1.6; from 17.1.0 through 17.1.2	NVD

References

References

https://my.f5.com/manage/s/article/K000150752	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.