CVE-2026-88157: Microsoft OpenSSH for Windows Remote Code Execution Vulnerability
Heap-based buffer overflow in OpenSSH for Windows allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft OpenSSH for Windows Remote Code Execution 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 10.0.28000.3231Patch KB5127646 - 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 10.0.26100.9711Patch KB5127648 - 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 10.0.26200.9711Patch KB5127648 - 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 10.0.20348.5761Patch KB5126655 - 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 10.0.17763.9376Patch KB5126651
Event History
Frequently Asked Questions
Which systems should be prioritized for assessment?
Prioritize Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, and Windows Server 2025 systems that use Microsoft OpenSSH for Windows.
What level of attacker access is required?
The attacker is unauthorized and can exploit the issue over a network. No privileges are required, but the listed vector indicates user interaction is required.
What impact could successful exploitation have?
Successful exploitation could allow code execution and has high potential impact on confidentiality, integrity, and availability.