CVE-2020-8599
Actively exploited. CVE-2020-8599 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- A vulnerability allows remote attackers to bypass authentication and write data to a path on affected installations.
- Who is affected
- Customers using Trend Micro Apex One and OfficeScan are affected.
- Urgency
- Remediation is critical as the vulnerability is actively exploited.
- Action
- Update to the latest version of Apex One and OfficeScan.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 96% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2020-8599: Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerabilitycisa-kev · 2021-11-03
External references
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[](https://www.csirts.com/cve/CVE-2020-8599)