SB2026071753 - Multiple vulnerabilities in Microsoft Windows Admin Center

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Authentication (CVE-ID: CVE-2026-56169)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error when processing authentication requests in Windows Admin Center. A remote user can bypass authentication process and gain elevated privileges on the target system.

2) Improper Authentication (CVE-ID: CVE-2026-57107)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to bypass authentication process.

The vulnerability exists due to an error when processing authentication requests in Windows Admin Center. A local user can bypass authentication process and gain elevated privileges on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56169
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57107