CVE-2026-32223 — Windows USB Printing Stack (usbprint.sys) Elevation of Privilege Vulnerability

Executive Summary

Heap-based buffer overflow in Windows USB Print Driver allows an unauthorized attacker to elevate privileges with a physical attack.

Overview

6.8

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Elevation of Privilege

Weakness CWE-122: Heap-based Buffer Overflow

Released Apr 14 2026

Last Updated Apr 14 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00522 — 0.41212 percentile

NVD CVSS 6.8 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Physical

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 5.9

EPSS Score

0.00522

probability of exploitation in the next 30 days

0.41212 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

8 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 11 Version 24H2 for ARM64-based Systems	`5083769 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 24H2 for x64-based Systems	`5083769 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 25H2 for ARM64-based Systems	`5083769 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 25H2 for x64-based Systems	`5083769 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 26H1 for ARM64-based Systems	`5083768 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 version 26H1 for x64-based Systems	`5083768 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2025	`5082063 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2025 (Server Core installation)	`5082063 (Security Update)`	Important	Elevation of Privilege	Yes

Patches

3 patches

Article	Type	Restart
`5083769`	Security Update	Yes
`5083768`	Security Update	Yes
`5082063`	Security Update	Yes

Patch Diff

ghidriff · usbprint.sys (KB5083769)

Patch diff 10.0.26100.7920 -> 10.0.26100.8246 (usbprint 1284-ID string bounds check, feature-gated)

Pre-patch version 10.0.26100.7920

Post-patch version 10.0.26100.8246

Function	Address	Change	Note
`wil_details_IsEnabledFallback`	`140008bf4 -> 140008d04`	code, refcount, length, sig, address, calling	similarity 0.47
`USBPRINT_CheckConfigs`	`1400034e0`	code, length, called	similarity 0.39
`wil_details_FeatureReporting_ReportUsageToServiceDirect`	`140002ea0`	code, length, sig	similarity 0.35
`Feature_Print_PlatformStabilizationFixes_2026_Wave1__private_IsEnabledFallback`	`140006068 -> 1400060dc`	code, length, sig, address	similarity 0.67
`wil_details_FeatureReporting_ReportUsageToService`	`140004a80 -> 140004aa0`	code, length, sig, address	similarity 0.5
`Make1284IdStringFromUsbStrings`	`1400069bc -> 140006a7c`	code, length, sig, address, called	similarity 0.12
`WriteDbgTraceWarning`	`140005b50 -> 140005b70`	refcount, address	similarity 1.0
`wil_details_FeatureStateCache_TryEnableDeviceUsageFastPath`	`140008a40 -> 140008b40`	code, length, sig, address	similarity 0.39

View full diff report View RCA report Download PoC

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Jongseong Kim (nevul37) working with ENKI Whitehat
hao huang
Thanatos Tian & @2st__ with Diffract & Zhiniang Peng with HUST
Dongjun Kim (smiljun), working with ENKI WhiteHat
Donghyeon Oh
Jonghoi Kim

References

MSRC Advisory MITRE NVD