CVE-2026-69276

CriticalCVSS 9.8/10Last modified Sep 30, 2026

Description

Integer underflow (wrap or wraparound) in Microsoft UxTheme Library (uxtheme.dll) allows an unauthorized attacker to execute code over a network.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122CWE-191

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1607>= 10.0.14393.0, < 10.0.14393.9512
MicrosoftWindows 10 Version 1809>= 10.0.17763.0, < 10.0.17763.9245
MicrosoftWindows 10 Version 21H2>= 10.0.19044.0, < 10.0.19044.7725
MicrosoftWindows 10 Version 22H2>= 10.0.19045.0, < 10.0.19045.7725
MicrosoftWindows 11 version 23H2>= 10.0.22631.0, < 10.0.22631.7582
MicrosoftWindows 11 Version 23H2>= 10.0.22631.0, < 10.0.22631.7582
MicrosoftWindows 11 Version 24H2>= 10.0.26100.0, < 10.0.26100.9445
MicrosoftWindows 11 Version 25H2>= 10.0.26200.0, < 10.0.26200.9445
MicrosoftWindows 11 version 26H1>= 10.0.28000.0, < 10.0.28000.2954
MicrosoftWindows Server 2012>= 6.2.9200.0, < 6.2.9200.26349
MicrosoftWindows Server 2012 (Server Core installation)>= 6.2.9200.0, < 6.2.9200.26349
MicrosoftWindows Server 2012 R2>= 6.3.9600.0, < 6.3.9600.23398
MicrosoftWindows Server 2012 R2 (Server Core installation)>= 6.3.9600.0, < 6.3.9600.23398
MicrosoftWindows Server 2016>= 10.0.14393.0, < 10.0.14393.9512
MicrosoftWindows Server 2016 (Server Core installation)>= 10.0.14393.0, < 10.0.14393.9512
MicrosoftWindows Server 2019>= 10.0.17763.0, < 10.0.17763.9245
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.17763.0, < 10.0.17763.9245
MicrosoftWindows Server 2022>= 10.0.20348.0, < 10.0.20348.5622
MicrosoftWindows Server 2025>= 10.0.26100.0, < 10.0.26100.33438
MicrosoftWindows Server 2025 (Server Core installation)>= 10.0.26100.0, < 10.0.26100.33438

References

Timeline

Published
Sep 8, 2026
Last modified
Sep 30, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-692777.8Stack-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locallCVE-2026-692787.8Incorrect authorization in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally.CVE-2026-692797.0Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.CVE-2026-69289.8IBM Concert 1.0.0 through 3.0.0 references or accesses memory after it has been freed. This allows an attacker who can influence program exeCVE-2026-692807.0Use after free in Windows Push Notifications allows an authorized attacker to elevate privileges locally.CVE-2026-692817.0Use after free in Windows License Manager allows an authorized attacker to elevate privileges locally.CVE-2026-692828.8Improper access control in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.CVE-2026-692837.8Heap-based buffer overflow in Windows CD-ROM Driver allows an authorized attacker to elevate privileges locally.CVE-2026-692847.8Heap-based buffer overflow in Windows DCOM Server allows an authorized attacker to elevate privileges locally.CVE-2026-692858.8Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.CVE-2026-692865.5Out-of-bounds read in Windows USB Audio Class driver (usbaudio.sys) allows an authorized attacker to disclose information locally.CVE-2026-692877.0Use after free in Windows Remote Desktop Services allows an authorized attacker to elevate privileges locally.
CVE-2026-69276: Critical severity, CVSS 9.8 | Vulnix