CVE-2026-94127
BIG-IP APM OAuth vulnerability
F5·BIG-IP APM
- Added
- Sep 22, 2026
- Fix due
- Sep 25, 2026
- Ransomware
- Not known
- Published
- Sep 22, 2026
- Updated
- Sep 23, 2026
- First covered
- Sep 23, 2026
- Latest story
- 2 months ago
Summary
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.
CWE-122Heap-based Buffer Overflow
Attack profile
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA required action
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.
Affected products
- F5 BIG-IP21.1.0 to before Hotfix-BIGIP-21.1.0.2.0.30.22-ENG17.5.0 to before Hotfix-BIGIP-17.5.1.9.0.160.12-ENG17.1.0 to before Hotfix-BIGIP-17.1.3.5.0.41.14-ENG