# CVE-2026-39459

## Summary

- **CVE ID:** CVE-2026-39459
- **Severity:** HIGH
- **CVSS Score:** 8.6 (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)
- **CWE:** CWE-272
- **Published:** May 13, 2026
- **Last Modified:** May 14, 2026

## 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.

## Affected Products

- F5 — BIG-IP (21.1.0)
- F5 — BIG-IP (21.0.0)
- F5 — BIG-IP (17.5.0)
- F5 — BIG-IP (17.1.0)
- F5 — BIG-IP (16.1.0)

## References

- [CNA](https://my.f5.com/manage/s/article/K000160863)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 17.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._