CVE-2026-57091: Windows File History Service Elevation of Privilege Vulnerability
Stack-based buffer overflow in Windows File History Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows File History Service 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 10.0.26100.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33158Patch KB5099536 - Upgrade
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Fixed in 10.0.28000.2525Patch KB5101649 - Upgrade
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Fixed in 10.0.14393.9339Patch KB5099535 - Upgrade
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Fixed in 10.0.17763.9020Patch KB5099538 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7548Patch KB5099539 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7548Patch KB5099539 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5386Patch KB5099540 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.8875Patch KB5101650
Event History
Frequently Asked Questions
Does an attacker need prior access to exploit this issue?
Yes. Exploitation requires an authorized attacker with local access to the affected system; the supplied vector is local and requires low privileges.
Is this a remote attack path?
No. The available CVSS vector identifies the attack vector as local, so the vulnerability is not described as remotely exploitable.
Which Windows platforms are identified as affected?
The affected software list includes Windows 10, including versions 21H2 and 22H2; Windows 11; and Windows Server 2016, 2019, 2022, and 2025.