CVE-2026-88161: Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability
Use after free in Windows Local Security Authority (LSA) allows an authorized attacker to elevate privileges locally.
Other sources
Windows Local Security Authority (LSA) 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 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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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 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected Windows system and able to execute an attack locally. The provided information does not indicate that it is remotely exploitable or requires user interaction.
What access could an attacker gain if exploitation succeeds?
Successful exploitation allows local privilege elevation. The supplied severity vector indicates potential high impact to confidentiality, integrity, and availability.
Which systems should be reviewed?
Review Microsoft Windows 10 and Windows 11 systems, along with Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems. The data does not identify affected build numbers, editions, or patch levels.
What conditions make exploitation harder?
The attacker needs existing low-level privileges and local access, and the attack complexity is rated high. No user interaction is required once those conditions are met.