importantSYS.SOURCE: The Hacker News• 2026-09-23T13:59:48+05:30

F5 Addresses Critical Zero-Day Vulnerability in BIG-IP APM Allowing Unauthenticated RCE on OAuth Servers

#vulnerability #network security #rce #oauth #f5

F5 has addressed a critical zero-day vulnerability (CVE-2026-94127) in BIG-IP Access Policy Manager (APM), enabling unauthenticated remote code execution (RCE) on systems where APM functions as an OAuth authorization server. The vulnerability, rated 9.8/10 on CVSS, has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog, with urgent mitigation recommendations for affected organizations.

Attackers are exploiting a critical flaw in F5 BIG-IP Access Policy Manager (APM) that lets them run code on a BIG-IP system without logging in, F5 says.

The flaw, CVE-2026-94127, affects only systems in which APM serves as an OAuth authorization server, issuing access tokens to applications. F5 disclosed it in an advisory on September 22 and has released engineering hotfixes.

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