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CVE-2026-55000: Windows USB Print Driver Privilege Elevation Risk

CVE-2026-55000 · published 3 months ago

Summary

The Windows USB Print Driver has a security weakness that could allow an attacker to gain more access to your computer than they should have. This could happen if an attacker physically accesses your device and exploits this weakness. To stay safe, update your Windows system with the latest security patches.

What to do

Update microsoft windows 11 version 24h2 to version 10.0.26100.8875 or later.
Update microsoft windows 11 version 25h2 to version 10.0.26200.8875 or later.
Update microsoft windows server 2025 to version 10.0.26100.33158 or later.
Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33158 or later.
Update microsoft windows_11_24h2 to version 10.0.26100.8875 or later.
Update microsoft windows_11_25h2 to version 10.0.26200.8875 or later.
Update microsoft windows_11_26h1 to version 10.0.28000.2525 or later.
Update microsoft windows_server_2025 to version 10.0.26100.33158 or later.

Affected software

Vendor	Product	Affected versions
microsoft	windows 11 version 24h2	< 10.0.26100.8875
microsoft	windows 11 version 25h2	< 10.0.26200.8875
microsoft	windows 11 version 26h1	< 10.0.28000.2269 < 10.0.28000.2525
microsoft	windows server 2025	< 10.0.26100.33158
microsoft	windows server 2025 (server core installation)	< 10.0.26100.33158
microsoft	windows_11_24h2	< 10.0.26100.8875 `cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*`
microsoft	windows_11_25h2	< 10.0.26200.8875 `cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*`
microsoft	windows_11_26h1	< 10.0.28000.2525 `cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*`
microsoft	windows_server_2025	< 10.0.26100.33158 `cpe:2.3:o:microsoft:windows_server_2025::::::::`

Original advisory text

Windows USB Print Driver Elevation of Privilege Vulnerability

Use after free in Windows USB Print Driver allows an unauthorized attacker to elevate privileges with a physical attack.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55000 vendor-advisory patch

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker full control

Severity

6.4 Medium

Exploitation

<1% chance of attack within 30 days

Type

CWE-416Use After Free

Timeline

Published14 Jul 2026

Updated4 Nov 2026

First seen14 Jul 2026

Sources

CVE-2026-55000 · NVD

CVE-2026-55000 · MITRE

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