CVE-2026-94127

CRITICAL CVSS 4.0: 9.3 EPSS 2.23% ACTIVE EXPLOIT
Updated Sep 23, 2026
F5

CISA Known Exploited Vulnerability (KEV)

This vulnerability is actively exploited in the wild. Immediate patching is strongly recommended.

Due Date: Sep 25, 2026

Parameter Value
CVSS 9.3 (CRITICAL)
Affected Versions 17.0.0 — 17.5.1
Type CWE-122 (Heap-based Buffer Overflow)
Vendor F5
Public PoC Yes

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Vulnerable Products 3

Configuration From (including) Up to (excluding)
F5 Big-Ip_Access_Policy_Manager
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
17.0.0 <= 17.1.3
F5 Big-Ip_Access_Policy_Manager
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
17.5.0 <= 17.5.1
F5 Big-Ip_Access_Policy_Manager
cpe:2.3:a:f5:big-ip_access_policy_manager:21.1.0:*:*:*:*:*:*:*
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