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PatchSiren cyber security CVE debrief

CVE-2019-18187 Trend Micro CVE debrief

CVE-2019-18187 is a Trend Micro OfficeScan directory traversal vulnerability. CISA has listed it in the Known Exploited Vulnerabilities catalog, which means defenders should treat it as a high-priority patching issue and follow the vendor’s update guidance.

Vendor
Trend Micro
Product
OfficeScan
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations running Trend Micro OfficeScan, along with security teams responsible for endpoint protection platforms, vulnerability management, and emergency patching.

Technical summary

The supplied sources identify the issue as a directory traversal vulnerability in Trend Micro OfficeScan. CISA’s KEV catalog marks the CVE as known exploited and directs defenders to apply updates per vendor instructions. No further technical details, affected version scope, or impact depth are provided in the supplied corpus.

Defensive priority

High. This CVE is in CISA’s Known Exploited Vulnerabilities catalog, so remediation should be prioritized according to organizational patch SLAs and exposure to OfficeScan deployments.

Recommended defensive actions

  • Check whether Trend Micro OfficeScan is deployed anywhere in the environment.
  • Apply the vendor-recommended updates as soon as possible.
  • Verify that endpoint security management servers and related OfficeScan components are included in patch plans.
  • Track remediation status against the CISA KEV due date of 2022-05-03 for historical context and current backlog review.
  • Monitor vendor and CISA advisories for any additional guidance tied to CVE-2019-18187.

Evidence notes

All statements above are limited to the supplied corpus and official links. The sources explicitly identify the CVE as a Trend Micro OfficeScan directory traversal vulnerability and show that CISA added it to the KEV catalog on 2021-11-03 with the note to apply updates per vendor instructions. No CVSS score, affected version list, or exploit details were provided in the supplied materials.

Sources and references

Verified primary and authoritative sources

  • CVE-2019-18187 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2019-18187

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2019-18187 NVD vulnerability detail

    Publisher, destination, and source semantics verified

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

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.