SB2026031068 - Multiple vulnerabilities in Microsoft Windows Accessibility Infrastructure (ATBroker.exe)

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2026-25186)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Windows Accessibility Infrastructure (ATBroker.exe). A local user can gain unauthorized access to sensitive information on the system.

2) Incorrect permission assignment for critical resource (CVE-ID: CVE-2026-24291)

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

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:P/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect permission assignment for critical resource in Windows Accessibility Infrastructure (ATBroker.exe). A local user can gain elevated privileges on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25186
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24291