CISA-confirmed known exploited vulnerability

CVE-2020-8599

Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability

Trend Micro · Apex One and OfficeScan

Vulnerability details

Trend Micro Apex One and OfficeScan server contain a vulnerable EXE file that could allow a remote attacker to write data to a path on affected installations and bypass root login.

Added to CISA KEV: 2021-11-03

Ransomware campaign use: Unknown

CISA due date: 2022-05-03

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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