PatchSiren

PatchSiren cyber security CVE debrief

CVE-2020-8599 Trend Micro CVE debrief

CVE-2020-8599 affects Trend Micro Apex One and OfficeScan and is listed by CISA as a Known Exploited Vulnerability. Organizations running these products should treat remediation as urgent and follow vendor update guidance.

Vendor
Trend Micro
Product
Apex One and 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

Security and IT teams responsible for Trend Micro Apex One or OfficeScan deployments, especially administrators who manage updates, endpoint protection, and related incident response.

Technical summary

The available source material identifies CVE-2020-8599 as an authentication bypass vulnerability in Trend Micro Apex One and OfficeScan. CISA included it in the Known Exploited Vulnerabilities catalog, which indicates it is considered a vulnerability of active defensive significance. No additional technical details or CVSS score were provided in the supplied corpus.

Defensive priority

High. Because this CVE is in CISA’s KEV catalog, affected environments should prioritize remediation using vendor instructions and verify that updates have been applied.

Recommended defensive actions

  • Apply updates per the vendor’s instructions.
  • Inventory all Apex One and OfficeScan installations to confirm exposure.
  • Verify remediation status across managed endpoints and servers.
  • Review CISA KEV guidance and vendor advisories for any additional required actions.
  • Investigate for unauthorized access if the affected products were unpatched during the exposure window.

Evidence notes

The source corpus identifies the vulnerability name, affected Trend Micro products, and CISA KEV status. The supplied data does not include a CVSS score, exploit mechanism details, or confirmed campaign attribution. Timeline context from the corpus shows CVE published/modified on 2021-11-03 and CISA KEV dateAdded on 2021-11-03 with dueDate 2022-05-03.

Official resources

CVE published and modified on 2021-11-03. CISA added the issue to its Known Exploited Vulnerabilities catalog on 2021-11-03 with a remediation due date of 2022-05-03.