CVE-2009-2523: Microsoft Windows 2000

High severity, CVSS 10.0. EPSS: 26.5% chance of exploitation in the next 30 days.

The License Logging Server (llssrv.exe) in Microsoft Windows 2000 SP4 allows remote attackers to execute arbitrary code via an RPC message containing a string without a null terminator, which triggers a heap-based buffer overflow in the LlsrLicenseRequestW method, aka "License Logging Server Heap Overflow Vulnerability."

Affected products

• Microsoft Windows 2000: any version

Published 2009-11-11. Last modified 2026-06-16.