Microsoft Windows LSASS Remote Code Execution Vulnerability

Vulnerability

A use-after-free vulnerability has been identified in the Windows Local Security Authority Subsystem Service (LSASS). This vulnerability allows an authorized attacker to execute code remotely over the network. The issue arises when the system improperly manages memory during authentication, potentially leading to a crash or other unintended behaviors.

Impact

Exploitation of this vulnerability could allow an authorized attacker to execute code remotely on the affected system.

Remediation

Users can apply the security update for this vulnerability, which is available through the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles KB5073379 for Windows Server 2025 and KB5074109 for Windows 11 versions 24H2 and 25H2.

Added: Jan 13, 2026, 7:50 PM
Updated: Jan 13, 2026, 7:50 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
7.5
exploitability
3.3
remediation
7.7
relevance
2.0
threat
0.0
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.