Vulnerability in F5 Big-Ip
CVE-2026-41217
A vulnerability exists in an undisclosed BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attacker with resource administrator or administrator role to execute arbitrary system commands with higher privileges. In Appliance mode deployments, a successful exploit can allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (4.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- F5 Big-Ip — versions 21.1.0, 21.0.0, 17.5.0
- F5 Big-Ip Access Policy Manager — versions 21.0.0
- F5 Big-Ip Advanced Firewall Manager — versions 21.0.0
- F5 Big-Ip Advanced Web Application Firewall — versions 21.0.0
- F5 Big-Ip Analytics — versions 21.0.0
- F5 Big-Ip Application Acceleration Manager — versions 21.0.0
- F5 Big-Ip Application Security Manager — versions 21.0.0
- F5 Big-Ip Application Visibility And Reporting — versions 21.0.0
- F5 Big-Ip Automation Toolchain — versions 21.0.0
- F5 Big-Ip Carrier-Grade Nat — versions 21.0.0
Weakness classification (CWE)
References
- my.f5.com/manage/s/article/K000161107 (vendor-advisory, Mitigation, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41217?
- CVE-2026-41217 is a high-severity vulnerability in F5 Big-Ip, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.9/10. Published 2026-05-13.
- How severe is CVE-2026-41217?
- High severity. CVSS v3 base score is 7.9 out of 10.