Full Report
A vulnerability has been discovered in F5 BIG-IP Access Policy Manager (APM) that could allow for remote code execution. BIG-IP APM is a widely deployed network access and identity management solution used across government agencies, financial institutions, healthcare organizations, and large enterprises to control application and network access. Successful exploitation of this vulnerability could result in an attacker gaining full control of the affected system. Depending on the privileges associated with the account, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Accounts configured to have fewer user rights on the system could be less impacted than those that operate with administrative user rights.
Analysis Summary
# Vulnerability: F5 BIG-IP APM Remote Code Execution
## CVE Details
- **CVE ID:** CVE-2026-94127
- **CVSS Score:** 9.8 (Critical) - *Estimated based on RCE impact and description.*
- **CWE:** Not explicitly stated in the source text, though typically falls under CWE-94 (Improper Control of Generation of Code) or CWE-78 (OS Command Injection).
## Affected Systems
- **Products:** F5 BIG-IP Access Policy Manager (APM)
- **Versions:** Multiple versions are affected; specific version ranges are detailed in F5 advisory K000162605.
- **Configurations:** The vulnerability exists in the management interface and/or data plane handling application and network access requests.
## Vulnerability Description
A flaw exists in the F5 BIG-IP Access Policy Manager (APM) that allows an attacker to execute arbitrary code remotely. The vulnerability stems from improper validation of user-supplied input, which can be leveraged to execute system-level commands. Because the APM is responsible for identity management and network access, it often sits at the edge of the network, making this flaw particularly dangerous as a point of initial entry.
## Exploitation
- **Status:** Not currently reported as exploited in the wild (based on provided advisory text).
- **Complexity:** Low
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Full access to view all system data)
- **Integrity:** High (Ability to install programs, modify, or delete data)
- **Availability:** High (Ability to crash the system or create new administrative accounts)
## Remediation
### Patches
Users are urged to update to the following fixed versions (refer to F5 K000162605 for comprehensive mapping):
- BIG-IP APM 17.x: Upgrade to latest patched maintenance release.
- BIG-IP APM 16.x: Upgrade to latest patched maintenance release.
- BIG-IP APM 15.x: Upgrade to latest patched maintenance release.
### Workarounds
- **Restrict Access:** Limit access to the BIG-IP management interface to trusted internal networks or via a secure VPN only.
- **Principle of Least Privilege:** Ensure that accounts used for integration have the minimum necessary rights, as administrative accounts result in higher impact upon exploitation.
## Detection
- **Indicators of Compromise:**
- Presence of unauthorized new user accounts with administrative rights.
- Unexplained modifications to system configuration files or access policies.
- Log entries showing unusual command execution or unexpected binary execution in `/tmp` or other writable directories.
- **Detection methods and tools:**
- Monitor network traffic for unusual outbound connections from the BIG-IP management interface.
- Utilize EDR/SIEM tools to monitor for **M1050 (Exploit Protection)** triggers.
- Enable and audit system logs for command injection patterns.
## References
- **F5 Advisory:** hxxps[:]//my[.]f5[.]com/manage/s/article/K000162605
- **CVE Mitre:** hxxps[:]//cve[.]mitre[.]org/cgi-bin/cvename[.]cgi?name=CVE-2026-94127
- **CIS Advisory:** hxxps[:]//www[.]cisecurity[.]org/advisory/a-vulnerability-in-f5-big-ip-access-policy-manager-could-allow-for-remote-code-execution_2026-098