F5 BIG-IP APM code injection

Summaryinfo

A vulnerability labeled as very critical has been found in F5 BIG-IP. This affects an unknown function of the component APM. Executing a manipulation can lead to code injection. This vulnerability is registered as CVE-2026-94127. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in F5 BIG-IP and classified as very critical. This vulnerability affects an unknown part of the component APM. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

When a BIG-IP APM access policy and an OAuth profile is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE). 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.

The advisory is shared for download at my.f5.com. This vulnerability was named CVE-2026-94127 since 09/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/22/2026). The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version Hotfix-BIGIP-17.1.3.5.0.41.14-ENG, Hotfix-BIGIP-17.5.1.9.0.160.12-ENG or Hotfix-BIGIP-21.1.0.2.0.30.22-ENG eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

License

• commercial

Website

• Vendor: https://f5.com/

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