SB20261111117 - OS Command Injection in Windows Admin Center

Description

This security bulletin contains information about 1 vulnerability.

1) OS Command Injection (CVE-ID: CVE-2026-122988)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to escalate privileges and execute code on the Windows Admin Center gateway with a gateway administrator's privileges.

The vulnerability exists due to improper neutralization of special elements used in an operating system command in Windows Admin Center when processing VM conversion operations. A remote user can send a specially crafted network request to execute code with a gateway administrator's privileges when that administrator subsequently performs a VM conversion operation.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-122988
• https://microsoft.visualstudio.com/WindowsAdminCenter/_artifacts/feed/WindowsAdminCenterExtensionNugetUnique/NuGet/msft.sme.vm-conversion/overview/2.1.36