CVE-2026-83871: Microsoft OpenSSH for Windows Elevation of Privilege Vulnerability
Heap-based buffer overflow in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.
Other sources
Microsoft OpenSSH for Windows 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 10.0.22631.7652Patch KB5126653 - 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 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - 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 10.0.26300.9711Patch 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 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648
Event History
Frequently Asked Questions
Which systems are in scope?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, and Windows Server 2025. The issue is specific to Microsoft OpenSSH for Windows.
What access does an attacker need?
An attacker must already be authorized on the target system and have local access. The vector indicates low privileges are sufficient, no user interaction is required, and exploitation has high attack complexity.
What could successful exploitation allow?
Successful exploitation can elevate local privileges. The provided metrics rate confidentiality, integrity, and availability impact as high.