CVE-2026-72936: Windows SMB Client Remote Code Execution Vulnerability
Use after free in Windows SMB Client allows an unauthorized attacker to execute code over a network.
Other sources
Windows SMB Client 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 10.0.28000.2954Patch KB5124012 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882
Event History
Frequently Asked Questions
Which systems should be prioritized for assessment?
The affected software list identifies Microsoft Windows 11, Microsoft Windows Server 2025, and Microsoft Windows Server 2022. The available data does not provide affected build numbers or update levels.
What access does an attacker need to exploit this issue?
The vector is network-based, and the attacker does not need prior privileges or user interaction. Exploitation is rated as high complexity, so additional unspecified conditions are required.