CVE-2019-18187
Published: November 3, 2021
Official Description
Trend Micro OfficeScan contains a directory traversal vulnerability by extracting files from a zip file to a specific folder on the OfficeScan server, leading to remote code execution.
CISA KEV Advisory
Trend Micro OfficeScan Directory Traversal Vulnerability
Trend Micro OfficeScan contains a directory traversal vulnerability by extracting files from a zip file to a specific folder on the OfficeScan server, leading to remote code execution.
Apply updates per vendor instructions.
Risk Analysis
Trend Micro OfficeScan contains a directory traversal vulnerability that allows an attacker to extract files from a zip archive to a specific folder on the OfficeScan server, leading to remote code execution. This poses a significant risk to the server's security. The high EPSS score of 0.78453 indicates a high likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation.
Active exploitation of this vulnerability has been observed in the wild, as confirmed by its presence in CISA's KEV. This vulnerability is remotely exploitable.
Apply the latest security patches and updates for Trend Micro OfficeScan. Implement strict file upload validation and restrict write access to sensitive directories on the server.
Technical Analysis
CVE-2019-18187 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-2019-18187 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-2019-18187 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