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

CISA Known Exploited Vulnerabilities

Name

Trend Micro OfficeScan Directory Traversal Vulnerability

Vendor

Trend Micro

Product

OfficeScan

Added to the catalog

2021-11-03

Due date for US federal agencies

2022-05-03

Weaknesses

CWE-22

Catalog version

2026.10.30

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.

Required action (CISA)

Apply updates per vendor instructions.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

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

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2019-10-28T20:15:11.003

Last modified

2026-06-17T02:24:26.050

Weaknesses

CWE-22

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.

References

• https://success.trendmicro.com/solution/000151730 (Broken Link, Vendor Advisory)
• https://success.trendmicro.com/solution/000151730 (Broken Link, Vendor Advisory)
• https://web.archive.org/web/20200215171235/https://success.trendmicro.com/solution/000151730 (Vendor Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18187 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:43.468Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2019-18187

CVE record

Assigner

trendmicro

State

PUBLISHED

Published

2019-10-28T19:28:32.000Z

Updated

2025-10-29T13:21:30.943Z

Problem types

Arbitrary File Upload with Directory Traversal

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.

References

• https://success.trendmicro.com/solution/000151730

Read on 2026-11-03T01:01:46.897Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2019/18xxx/CVE-2019-18187.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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