CVE-2026-88174: Windows Deployment Services Remote Code Execution Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Deployment Services allows an unauthorized attacker to execute code over a network.
Other sources
Windows Deployment Services 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 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - 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 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
What access does an attacker need to attempt exploitation?
The attack vector is network-based. No privileges or user interaction are required, but exploitation is rated as high complexity.
Which systems should be prioritized for assessment?
Prioritize systems running Windows Deployment Services, particularly deployments on the listed Microsoft Windows 10 and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 platforms.