MSRC-CVE-2026-45593 — Windows SDK Elevation of Privilege Vulnerability

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could elevate from a low integrity level up to a medium integrity level.

Security updates
10.0.28000.2269 — https://support.microsoft.com/help/5095051
10.0.17763.8880 — https://support.microsoft.com/help/5094123
10.0.20348.5256 — https://support.microsoft.com/help/5094128
10.0.19044.7417 — https://support.microsoft.com/help/5094127
10.0.26100.32995 — https://support.microsoft.com/help/5094125
10.0.26200.8655 — https://support.microsoft.com/help/5094126
10.0.22631.7219 — https://support.microsoft.com/help/5093998

Vulnerabilities 1

High 7.8

CVE-2026-45593

Windows SDK Elevation of Privilege Vulnerability

Use after free in Windows SDK allows an authorized attacker to elevate privileges locally.

Microsoft Windows Server 2019 Windows Server 2019 (Server Core installation) Windows 10 Version 1809 Windows

Jun 9, 2026

Revision history

2026-08-13 #3
Acknowledgement Updated
2026-06-09 #1
Updated an acknowledgement. This is an informational change only.
2026-06-09 #2
Information published.

References

CVE-2026-45593 Windows SDK Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45593
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss