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CVE-2019-18187

Trend Micro OfficeScan Directory Traversal

7.5 HIGHActively exploited (CISA KEV)EPSS 25.1%
  1. Published28 Oct 2019
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

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.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Trend Micro Officescan11.0 · xg

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2019-18187 being actively exploited?

Yes. CVE-2019-18187 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2019-18187?

CVE-2019-18187 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 25.1% probability of exploitation.

Which products are affected by CVE-2019-18187?

Affected products include Trend Micro Officescan.

How do I fix CVE-2019-18187?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-18187 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.