Vulnerability in F5 Big-Ip
CVE-2025-61938
When a BIG-IP Advanced WAF or ASM security policy is configured with a URL greater than 1024 characters in length for the Data Guard Protection Enforcement setting, either manually or through the automatic Policy Builder, the bd process can terminate repeatedly. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (25.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- F5 Big-Ip — versions 17.5.0, 17.1.0, 16.1.0
- F5 Big-Ip Advanced Web Application Firewall — versions 17.5.0
- F5 Big-Ip Application Security Manager — versions 17.5.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- my.f5.com/manage/s/article/K000156624 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-61938?
- CVE-2025-61938 is a high-severity vulnerability in F5 Big-Ip, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2025-10-15.
- How severe is CVE-2025-61938?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-61938 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.