CVE-2026-83516: Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Out-of-bounds read in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Other sources
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service 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 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Does exploitation require authentication or user interaction?
No. The supplied vector indicates no privileges are required and no user interaction is required; the attack can be performed over a network.
Which systems are listed as affected?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, Windows Server 2025, and Microsoft Local Security Authority Subsystem Service (LSASS).
What is the expected security impact?
The supplied vector rates availability impact as high, while confidentiality and integrity impacts are listed as none. The stated outcome is denial of service.