CVE-2003-0110: Microsoft Isa Server

Medium severity, CVSS 5.0. EPSS: 18% chance of exploitation in the next 30 days.

The Winsock Proxy service in Microsoft Proxy Server 2.0 and the Microsoft Firewall service in Internet Security and Acceleration (ISA) Server 2000 allow remote attackers to cause a denial of service (CPU consumption or packet storm) via a spoofed, malformed packet to UDP port 1745.

Affected products

• Microsoft Isa Server: version 2000 only
• Microsoft Proxy Server: version 2.0 only

Published 2003-05-05. Last modified 2026-06-16.