CVE-2019-18187
Published 2019-10-28 · Updated 2026-06-17 · Source security@trendmicro.com
Summary
CVE-2019-18187 is a high-severity (CVSS 7.5) vulnerability in Trend Micro OfficeScan. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Trend Micro has 12 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 12 known-exploited Trend Micro vulnerabilities →Description
Trend Micro OfficeScan versions 11.0 and XG (12.0) could be exploited by an attacker utilizing a directory traversal vulnerability to extract files from an arbitrary zip file to a specific folder on the OfficeScan server, which could potentially lead to remote code execution (RCE). The remote process execution is bound to a web service account, which depending on the web platform used may have restricted permissions. An attempted attack requires user authentication.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA Known-Exploited Vulnerability
Product: Trend Micro — OfficeScan
Name: Trend Micro OfficeScan Directory Traversal Vulnerability
Date added: 2021-11-03 · Due: 2022-05-03
Required action: Apply updates per vendor instructions.

