CVE-2026-94127

When a BIG-IP APM access policy and an OAuth profile are configured on a virtual server, specific malicious traffic can lead to remote code execution (RCE). This vulnerability is only present when BIG-IP APM is configured as an OAuth Authorization Server. Deployments using APM strictly as an OAuth Client / Resource Server (without OAuth authorization server profiles configured) are not affected by this vulnerability. Impact: This vulnerability allows an unauthenticated attacker to perform remote code execution. The BIG-IP system in Appliance mode is also vulnerable. This is a data plane issue; there is no control plane exposure. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - f5sirt@f5.com

Published

2026-09-22

Last modified

2026-09-23

Known exploited (CISA KEV)

since 2026-09-22, action due 2026-09-25: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weaknesses

CWE-122

Affected products

• Big-ip (F5)
• Big-ip Access Policy Manager (F5)

References

• https://my.f5.com/manage/s/article/K000162605
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-94127