What is CVE-2025-21087?

CVE-2025-21087 is a high-severity vulnerability in F5 Big-ip, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-02-05.

How severe is CVE-2025-21087?

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

Resource exhaustion in F5 Big-ip

CVE-2025-21087

When Client or Server SSL profiles are configured on a Virtual Server, or DNSSEC signing operations are in use, undisclosed traffic can cause an increase in memory and CPU resource utilization. Note: Software versions which have reach…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.004 (62.1th 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 17.1.0, 16.1.0, 15.1.0
F5 Big-ip Next — versions 20.0.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

my.f5.com/manage/s/article/K000134888 (vendor-advisory)

Frequently asked questions

What is CVE-2025-21087?: CVE-2025-21087 is a high-severity vulnerability in F5 Big-ip, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-02-05.
How severe is CVE-2025-21087?: High severity. CVSS v3 base score is 7.5 out of 10.