CVE-2026-24291

Windows Accessibility Infrastructure (ATBroker.exe) Elevation of Privilege Vulnerability

Incorrect permission assignment for critical resource in Windows Accessibility Infrastructure (ATBroker.exe) allows an authorized attacker to elevate privileges locally.

Affected

Microsoft · Windows 10 Version 1607 · Windows 10 Version 1809 · Windows 10 Version 21H2 · Windows 10 Version 22H2 · Windows 11 version 22H3 · Windows 11 Version 23H2

CVSS v3.1 MICROSOFT

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

3.30% chance of exploitation in the next 30 days, 88th percentile

Published

2026-03-10

Updated

2026-06-19

Proof-of-concept exploits (4)

• lennertdefauw/CVE-2026-242914★ · 2026-03-19
• n0isegat3/RegPwnBRc4BOF3★ · 2026-03-18
• uname1able/CVE-2026-242910★ · 2026-03-26
• thomsoe/regpwn-cpp0★ · 2026-04-18

Security advisories

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

References

• CVE Record
• NVD entry

Related

• CVE-2025-8088
• CVE-2022-24481
• CVE-2022-24521
• CVE-2022-37969
• CVE-2025-21333
• CVE-2025-29824