Elevation of Privilege Vulnerability in Windows Accessibility Infrastructure by Microsoft

CVE-2026-24291

What is CVE-2026-24291?

CVE-2026-24291 is an elevation of privilege vulnerability affecting the Windows Accessibility Infrastructure, specifically associated with the ATBroker executable. This vulnerability arises from incorrect permission assignments for a critical resource within the system, enabling an authorized user to gain elevated privileges locally. Such a flaw can be detrimental to organizations, as it may allow malicious actors, who already have some level of access, to escalate their permissions and manipulate system settings or data beyond their intended access levels. This poses a significant security risk, particularly in environments where administrative controls are crucial for safeguarding sensitive information and maintaining system integrity.

Potential impact of CVE-2026-24291

1. Local Privilege Escalation: Attackers with limited access can exploit this vulnerability to elevate their privileges, potentially gaining administrative rights. This could allow them to execute arbitrary code, modify system configurations, or access sensitive data.

2. Compromise of Sensitive Information: With elevated permissions, an attacker could exfiltrate confidential information, manipulate financial records, or engage in identity theft, significantly impacting organizational trust and financial stability.

3. Increased Attack Surface for Malware: This vulnerability can serve as a gateway for further attacks within an organization's network. Once an attacker gains elevated privileges, they could deploy additional malware, including ransomware, jeopardizing the integrity of critical systems and data.

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