Physical privilege escalation via USB heap overflow
Published Apr 14, 2026 · Updated Apr 14, 2026
Heap-based buffer overflow in Microsoft Windows USB Print Driver allows physically proximate attackers to elevate privileges. Microsoft identifies usbprint.sys as the affected locus but has not published the malformed USB print data or unsafe memory operation that overruns the heap. An attacker needs physical access to attach a crafted USB printing device; successful exploitation grants elevated Windows privileges.
Summary
What happened
Heap-based buffer overflow in Microsoft Windows USB Print Driver allows physically proximate attackers to elevate privileges. Microsoft identifies usbprint.sys as the affected locus but has not published the malformed USB print data or unsafe memory operation that overruns the heap. An attacker needs physical access to attach a crafted USB printing device; successful exploitation grants elevated Windows privileges.
The record
- CVE
- CVE-2026-32223
- Published
- Apr 14, 2026
- Updated
- Apr 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-122, T1068
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 14, 2026CVE publishedPublication date reported by the CVE source.
- Apr 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.32690
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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