CVE-2004-1023: Kerio Mailserver

Low severity, CVSS 2.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Kerio Winroute Firewall before 6.0.9, ServerFirewall before 1.0.1, and MailServer before 6.0.5, when installed on Windows based systems, do not modify the ACLs for critical files, which allows local users with Power Users privileges to modify programs, install malicious DLLs in the plug-ins folder, and modify XML files related to configuration.

Affected products

• Kerio Kerio Mailserver: version 6.0.0 only; version 6.0.1 only; version 6.0.2 only; version 6.0.3 only; version 6.0.4 only
• Kerio Serverfirewall: version 1.0.0 only
• Kerio Winroute Firewall: version 6.0.0 only; version 6.0.1 only; version 6.0.2 only; version 6.0.3 only; version 6.0.4 only; version 6.0.5 only; …

Published 2005-01-10. Last modified 2026-06-16.