CVE-2003-0565

Medium severity, CVSS 5.0. EPSS: 3.3% chance of exploitation in the next 30 days.

Multiple vulnerabilities in multiple vendor implementations of the X.400 protocol allow remote attackers to cause a denial of service and possibly execute arbitrary code via an X.400 message containing certain unexpected ASN.1 constructs, as demonstrated using the NISSC test suite.

Published 2003-12-01. Last modified 2026-06-16.