CVE-2016-0099: Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-03-03. EPSS: 37% chance of exploitation in the next 30 days.

The Secondary Logon Service in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 does not properly process request handles, which allows local users to gain privileges via a crafted application, aka "Secondary Logon Elevation of Privilege Vulnerability."

Affected products

• Microsoft Windows 10 1507: affected versions not specified
• Microsoft Windows 10 1511: affected versions not specified
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified; version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Vista: affected versions not specified

Published 2016-03-09. Last modified 2026-06-17.