CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
Trend Micro Apex One (2019) and OfficeScan XG server contain a vulnerable EXE file that could allow a remote attacker to write arbitrary data to an arbitrary path on affected installations and bypass ROOT login. Authentication is not required to exploit this vulnerability.
Affected products
trendmicro: apex one; trendmicro: officescan
References5
- success.trendmicro.com/jp/solution/000244253 Broken LinkPatchVendor Advisory
- success.trendmicro.com/solution/000245571 Broken LinkPatchVendor Advisory
- success.trendmicro.com/jp/solution/000244253 Broken LinkPatchVendor Advisory
- success.trendmicro.com/solution/000245571 Broken LinkPatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 12% percentile: 96 · as of 11 November 2026
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