CVE-2009-1216: Microsoft Subsystem For Unix-Based Applications

High severity, CVSS 10.0. EPSS: 24.5% chance of exploitation in the next 30 days.

Multiple unspecified vulnerabilities in (1) unlzh.c and (2) unpack.c in the gzip libraries in Microsoft Windows Server 2008, Windows Services for UNIX 3.0 and 3.5, and the Subsystem for UNIX-based Applications (SUA); as used in gunzip, gzip, pack, pcat, and unpack 7.x before 7.0.1701.48, 8.x before 8.0.1969.62, and 9.x before 9.0.3790.2076; allow remote attackers to execute arbitrary code via unknown vectors.

Affected products

• Microsoft Subsystem For Unix-Based Applications: any version
• Microsoft Windows Server 2008: any version
• Microsoft Windows Services For Unix: version 3.0 only; version 3.5 only
• Microsoft Windows Vista: any version

Published 2009-04-01. Last modified 2026-06-16.