Vulnerability in F5 Big-Ip
CVE-2026-22548
When a BIG-IP Advanced WAF or ASM security policy is configured on a virtual server, undisclosed requests along with conditions beyond the attacker's control can cause the bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (8.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- F5 Big-Ip — versions 21.0.0, 17.5.0, 17.1.0
- F5 Big-Ip Advanced Web Application Firewall
- F5 Big-Ip Application Security Manager
Weakness classification (CWE)
References
- my.f5.com/manage/s/article/K000158072 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-22548?
- CVE-2026-22548 is a medium-severity vulnerability in F5 Big-Ip, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2026-02-04.
- How severe is CVE-2026-22548?
- Medium severity. CVSS v3 base score is 5.9 out of 10.