CVE-2020-26941: Eset Endpoint Antivirus

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A local (authenticated) low-privileged user can exploit a behavior in an ESET installer to achieve arbitrary file overwrite (deletion) of any file via a symlink, due to insecure permissions. The possibility of exploiting this vulnerability is limited and can only take place during the installation phase of ESET products. Furthermore, exploitation can only succeed when Self-Defense is disabled. Affected products are: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versions 13.2 and lower; ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versions 7.3 and lower; ESET File Security for Microsoft Windows Server, ESET Mail Security for Microsoft Exchange Server, ESET Mail Security for IBM Domino, ESET Security for Kerio, ESET Security for Microsoft SharePoint Server versions 7.2 and lower.

Affected products

• Eset Endpoint Antivirus: up to and including 7.3
• Eset Endpoint Security: up to and including 7.3
• Eset File Security: up to and including 7.2
• Eset Internet Security: up to and including 13.2; version 1294 only
• Eset Mail Security: up to and including 7.2
• Eset NOD32 Antivirus: up to and including 7.3; up to and including 13.2
• Eset Security: up to and including 7.2
• Eset Smart Security: up to and including 7.3; up to and including 13.2

Published 2021-01-26. Last modified 2026-06-17.