Vulnerability details
CVE-2026-39459
F5 BIG-IP
iControl REST and tmsh vulnerability
CVSS 4.0
8.6High
Official description
A vulnerability exists in iControl REST and the TMOS Shell (tmsh) where a highly privileged, authenticated attacker with at least the Manager role can create configuration objects that allow running arbitrary commands. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.6High | 4.0 | CVEProject cvelistV5 (CNA) (f5) | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 7.2High | 3.1 | CVEProject cvelistV5 (CNA) (f5) | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| F5 | BIG-IP | 16.1.0 ≤ v | CVEProject cvelistV5 (CNA) |
| F5 | BIG-IP | 17.1.0 ≤ v < 17.1.3.2 | CVEProject cvelistV5 (CNA) |
| F5 | BIG-IP | 17.5.0 ≤ v < 17.5.1.6 | CVEProject cvelistV5 (CNA) |
| F5 | BIG-IP | 21.0.0 ≤ v < 21.0.0.2 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://my.f5.com/manage/s/article/K000160863 vendor-advisorypatch
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Details
- Published
- 2026-05-13
- Last updated
- 2026-05-14
- State
- Published
- Assigner (CNA)
- f5
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
17.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-272Least Privilege Violation