CVE-2003-0487: Kerio Mailserver

High severity, CVSS 7.5. EPSS: 11.4% chance of exploitation in the next 30 days.

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

Affected products

• Kerio Kerio Mailserver: version 5.6.3 only

Published 2003-08-07. Last modified 2026-06-16.