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.
- Published Sep 22, 2026
- CVSS 9.3 critical
- 2.2% chance of exploitation in the next 30 days (EPSS)
- In CISA's Known Exploited Vulnerabilities catalog
Affected software
In the news
- Critical FortiMail Zero-Day Flaw Exploited in Attacks Allows Unauthenticated Arbitrary File Writes The Hacker News ·
- ⚡ Weekly Recap: $387M Crypto Hack, Citrix Exploits, AI Agents Go Off-Script, and More Threats The Hacker News ·
- Heap-based buffer overflow vulnerability in F5 BIG-IP Access Policy Manager (CVE-2026-94127) JPCERT/CC ·
- F5 Patches Critical BIG-IP APM Zero-Day Exploited for Unauthenticated RCE on OAuth Servers The Hacker News ·
- A Vulnerability in F5 BIG-IP Access Policy Manager Could Allow for Remote Code Execution CIS MS-ISAC ·
- Vulnerability in F5 BIG-IP CERT-FR ·
- F5 security advisory (AV26-949) – Update 1 Canadian Centre for Cyber Security ·
- Vulnerability impacting F5 BIG-IP Access Policy Manager (APM) – CVE-2026-94127 Canadian Centre for Cyber Security ·
- Critical Vulnerability in F5 BIG-IP APM CERT-EU ·
- CISA Adds Four Known Exploited Vulnerabilities to Catalog CISA ·