SB2026021083 - Multiple vulnerabilities in Microsoft ACI Confidential Containers

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cleartext storage of sensitive information (CVE-ID: CVE-2026-23655)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to cleartext storage of sensitive information in Microsoft ACI Confidential Containers. A remote user can gain access to secret tokens and keys.

2) Command Injection (CVE-ID: CVE-2026-21522)

The vulnerability allows a local user to execute arbitrary commands on the system.

The vulnerability exists due to insufficient input validation in Microsoft ACI Confidential Containers. A local administrator can pass specially crafted data to the application and execute arbitrary commands with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23655
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21522