CVE-2001-0546: Microsoft Isa Server

Medium severity, CVSS 5.0. EPSS: 17.3% chance of exploitation in the next 30 days.

Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to cause a denial of service (resource exhaustion) via a large amount of malformed H.323 data.

Affected products

• Microsoft Isa Server: version 2000 only

Published 2001-09-20. Last modified 2026-06-16.