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CVE-2026-54991— Windows USB Print Driver Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 11 Version 24H2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Windows USB Print Driver是美国Microsoft公司的一款系统级驱动程序，用于支持通过USB接口连接的打印设备。 Microsoft Windows USB Print Driver存在安全漏洞，该漏洞源于共享资源使用不当同步（竞争条件），可能导致已授权攻击者在本地提升权限。以下版本受到影响：Windows 11 Version 24H2 10.0.26100.8875之前版本、Windows 11 Version 25H2 10.0.26200.8875之前版

CVSS 7.8 · High EPSS 0.15% · P5

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 5

VendorProduct Version RangeStatus
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.8875 affected
Microsoft Windows 11 Version 25H2 10.0.26200.0< 10.0.26200.8875 affected
Microsoft Windows 11 version 26H1 10.0.28000.0< 10.0.28000.2525 affected
Microsoft Windows Server 2025 10.0.26100.0< 10.0.26100.33158 affected
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0< 10.0.26100.33158 affected
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I. Basic Information for CVE-2026-54991

Vulnerability Information
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Vulnerability Title
Windows USB Print Driver Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows USB Print Driver 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows USB Print Driver是美国Microsoft公司的一款系统级驱动程序，用于支持通过USB接口连接的打印设备。 Microsoft Windows USB Print Driver存在安全漏洞，该漏洞源于共享资源使用不当同步（竞争条件），可能导致已授权攻击者在本地提升权限。以下版本受到影响：Windows 11 Version 24H2 10.0.26100.8875之前版本、Windows 11 Version 25H2 10.0.26200.8875之前版
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.8875 -
Microsoft Windows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.8875 -
Microsoft Windows 11 version 26H1 10.0.28000.0 ~ 10.0.28000.2525 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.33158 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.33158 -

II. Public POCs for CVE-2026-54991

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III. Intelligence Information for CVE-2026-54991

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Vendor Advisories for CVE-2026-54991 (1)

Same Patch Batch · Microsoft · 2026-07-14 · 570 CVEs total

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CVE-2026-54990 9.8 CRITICAL Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-49172 9.8 CRITICAL Windows FTP Service Remote Code Execution Vulnerability
CVE-2026-48561 9.6 CRITICAL Microsoft Edge Copilot Remote Code Execution Vulnerability
CVE-2026-50380 9.6 CRITICAL Windows GDI+ Remote Code Execution Vulnerability
CVE-2026-55008 9.6 CRITICAL Microsoft Exchange Server Spoofing Vulnerability
CVE-2026-49798 9.3 CRITICAL Windows Kernel Elevation of Privilege Vulnerability
CVE-2026-55040 9.1 CRITICAL Microsoft SharePoint Server Security Feature Bypass Vulnerability

Showing top 20 of 570 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 11 Version 24H2
Same vendor: Microsoft
Same weakness: CWE-362

V. Comments for CVE-2026-54991

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