CVE-2026-69594: Microsoft Local Security Authority (LSA) Server Elevation of Privilege Vulnerability
Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locally.
Other sources
Microsoft Local Security Authority (LSA) Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9445Patch KB5124008
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on an affected system and able to execute actions locally. The available data does not indicate that it can be exploited remotely or without prior access.
Which systems are identified as affected?
The listed affected products are Microsoft Windows 11 and Microsoft Windows Server 2025.
What level of impact could successful exploitation have?
Successful exploitation allows local privilege elevation and is rated as having high confidentiality, integrity, and availability impact.