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CVE-2019-18187: Trend Micro OfficeScan Directory Traversal Vulnerability

criticalknown exploitedCVE-2019-18187
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Trend Microproduct: OfficeScanPath traversalRemote code execution
What
A directory traversal vulnerability allows for remote code execution by extracting files from a zip file to a specific folder.
Who is affected
Deployments of Trend Micro OfficeScan.
Urgency
Immediate action is necessary as the vulnerability is actively exploited and rated critical.
Action
Update to the latest version of OfficeScan.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-18187

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2019-18187coverage & exploitation statusNVD · CVE.org

Recent advisories for Trend Micro OfficeScan

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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