What is CVE-2025-54479?

CVE-2025-54479 is a high-severity vulnerability in F5 Big-ip, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2025-10-15.

How severe is CVE-2025-54479?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in F5 Big-ip

CVE-2025-54479

When a classification profile is configured on a virtual server without an HTTP or HTTP/2 profile, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Tech…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (25.1th percentile) — read the EPSS interpretation.

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.

Affected products

F5 Big-ip — versions 17.5.0, 17.1.0, 16.1.0
F5 Big-ip Next Cnf — versions 2.0.0, 1.1.0
F5 Big-ip Next For Kubernetes — versions 2.0.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

my.f5.com/manage/s/article/K000151475 (vendor-advisory)

Frequently asked questions

What is CVE-2025-54479?: CVE-2025-54479 is a high-severity vulnerability in F5 Big-ip, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2025-10-15.
How severe is CVE-2025-54479?: High severity. CVSS v3 base score is 7.5 out of 10.