How severe is CVE-2025-55669?

CVE-2025-55669 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-55669 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55669?

CVE-2025-55669 affects F5 Big-ip Application Security Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55669?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-55669 have an EU (EUVD) identifier?

Yes. CVE-2025-55669 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34649.

When was CVE-2025-55669 published?

CVE-2025-55669 was published on 2025-10-15 and last updated on 2026-06-17.

CVE-2025-55669

CVE-2025-55669 is a high-severity vulnerability in F5 Big-ip Application Security Manager with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-672.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34649
Weakness: CWE-672
Affected product: F5 Big-ip Application Security Manager
Published: 2025-10-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-55669?: CVE-2025-55669 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-55669 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55669?: CVE-2025-55669 affects F5 Big-ip Application Security Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55669?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-55669 have an EU (EUVD) identifier?: Yes. CVE-2025-55669 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34649.
When was CVE-2025-55669 published?: CVE-2025-55669 was published on 2025-10-15 and last updated on 2026-06-17.

References

https://my.f5.com/manage/s/article/K000150752

Affected products (1)

cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*

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