Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.

CVE-2025-29833: Windows VM Bug Allows Local Code Execution

CVE-2025-29833 · published 1 year ago

Summary

An attacker can run malicious code on a Windows Virtual Machine due to a design flaw. This could lead to unauthorized access to sensitive data or system resources. Users should update their Windows Virtual Machines to the latest version to prevent this issue.

What to do

Update microsoft windows_10_1507 to version 10.0.10240.21014 or later.
Update microsoft windows_10_1607 to version 10.0.14393.8066 or later.
Update microsoft windows_10_1809 to version 10.0.17763.7314 or later.
Update microsoft windows_10_21h2 to version 10.0.19044.5854 or later.
Update microsoft windows_10_22h2 to version 10.0.19045.5854 or later.
Update microsoft windows_11_22h2 to version 10.0.22621.5335 or later.
Update microsoft windows_11_23h2 to version 10.0.22631.5335 or later.
Update microsoft windows_11_24h2 to version 10.0.26100.4061 or later.
Update microsoft windows_server_2016 to version 10.0.14393.8066 or later.
Update microsoft windows_server_2019 to version 10.0.17763.7314 or later.
Update microsoft windows_server_2022 to version 10.0.20348.3692 or later.
Update microsoft windows_server_2022_23h2 to version 10.0.25398.1611 or later.
Update microsoft windows_server_2025 to version 10.0.26100.4061 or later.

Affected software

Vendor	Product	Affected versions
microsoft	windows_10_1507	< 10.0.10240.21014 `cpe:2.3:o:microsoft:windows_10_1507:::::::x64:*`
microsoft	windows_10_1607	< 10.0.14393.8066 `cpe:2.3:o:microsoft:windows_10_1607:::::::x64:*`
microsoft	windows_10_1809	< 10.0.17763.7314 `cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*`
microsoft	windows_10_21h2	< 10.0.19044.5854 `cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:*`
microsoft	windows_10_22h2	< 10.0.19045.5854 `cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:*`
microsoft	windows_11_22h2	< 10.0.22621.5335 `cpe:2.3:o:microsoft:windows_11_22h2:::::::arm64:*`
microsoft	windows_11_23h2	< 10.0.22631.5335 `cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*`
microsoft	windows_11_24h2	< 10.0.26100.4061 `cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*`
microsoft	windows_server_2012	r2 `cpe:2.3:o:microsoft:windows_server_2012:-:::::::*`
microsoft	windows_server_2016	< 10.0.14393.8066 `cpe:2.3:o:microsoft:windows_server_2016::::::::`
microsoft	windows_server_2019	< 10.0.17763.7314 `cpe:2.3:o:microsoft:windows_server_2019::::::::`
microsoft	windows_server_2022	< 10.0.20348.3692 `cpe:2.3:o:microsoft:windows_server_2022::::::::`
microsoft	windows_server_2022_23h2	< 10.0.25398.1611 `cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::`
microsoft	windows_server_2025	< 10.0.26100.4061 `cpe:2.3:o:microsoft:windows_server_2025::::::::`

Original advisory text

Time-of-check time-of-use (toctou) race condition in Windows Virtual Machine Bus allows an unauthorized attacker to execute code locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29833 Vendor Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker full control

Severity

7.7 High

Exploitation

<1% chance of attack within 30 days

Type

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition

Timeline

Published13 May 2025

Updated4 Nov 2026

First seen7 Mar 2026

Sources

CVE-2025-29833 · NVD

Track software like this

Free during beta