Vulnerability in F5 Big-Ip
CVE-2025-61974
When a client SSL profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
EPSS: 0.004 (35.2th 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_cloud-native_network_functions
- F5 Big-ip Next Cnf — versions 2.0.0, 1.1.0
- F5 Big-ip Next For Kubernetes — versions 2.0.0
- F5 Big-ip_next_for_kubernetes — versions 2.0.0, 2.1.0
- F5 Big-ip_next_service_proxy_for_kubernetes
- F5 Big-ip Next Spk — versions 2.0.0, 1.9.0, 1.8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- f5sirt@f5.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-61974?
- CVE-2025-61974 is a high-severity vulnerability in F5 Big-Ip, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2025-10-15.
- How severe is CVE-2025-61974?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-61974 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.