CVE-2020-5902
Published: November 3, 2021
Official Description
F5 BIG-IP Traffic Management User Interface (TMUI) contains a remote code execution vulnerability in undisclosed pages.
CISA KEV Advisory
F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability
F5 BIG-IP Traffic Management User Interface (TMUI) contains a remote code execution vulnerability in undisclosed pages.
Apply updates per vendor instructions.
Risk Analysis
F5 BIG-IP Traffic Management User Interface (TMUI) contains a remote code execution vulnerability in undisclosed pages. This critical flaw, with its high EPSS score and confirmed exploitation, poses an immediate and severe risk. Attackers can execute arbitrary code on the affected device, leading to full system compromise.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, confirming its use by threat actors. The flaw is remotely exploitable through undisclosed pages within the TMUI.
Administrators of F5 BIG-IP devices should apply the latest security updates to patch the TMUI. Restricting access to the TMUI and monitoring for suspicious activity are critical steps to mitigate this risk.
Technical Analysis
CVE-2020-5902 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-5902 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-5902 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1