CVE-2020-8599
Published: November 3, 2021
Official Description
Trend Micro Apex One and OfficeScan server contain a vulnerable EXE file that could allow a remote attacker to write data to a path on affected installations and bypass root login.
CISA KEV Advisory
Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability
Trend Micro Apex One and OfficeScan server contain a vulnerable EXE file that could allow a remote attacker to write data to a path on affected installations and bypass root login.
Apply updates per vendor instructions.
Risk Analysis
This high-severity vulnerability in Trend Micro Apex One and OfficeScan server involves a vulnerable EXE file that allows a remote attacker to write data to an arbitrary path and bypass root login. The high EPSS score and inclusion in CISA's KEV indicate that this flaw has been actively exploited and poses a significant risk. This could lead to unauthorized access and system compromise.
This vulnerability is actively being exploited in the wild. It is remotely exploitable, allowing an attacker to write data to affected installations.
Organizations using Trend Micro Apex One and OfficeScan server should apply all available security patches immediately. Regularly review and harden server configurations to prevent unauthorized file writes.
Technical Analysis
CVE-2020-8599 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-2020-8599 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-2020-8599 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