EUVD-2026-73668
GHSA-pjx4-qxxq-cg7r
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector with low-privilege requirement confirmed by description; full C/I/A:H reflects SYSTEM-level kernel code execution achievable via heap corruption.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows USB Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via heap-based buffer overflow in the Windows USB driver stack allows a low-privileged local attacker to gain SYSTEM-level access on affected Windows 10, Windows 11, and Windows Server versions. The vulnerability (CWE-122) resides in kernel-mode USB driver handling, where malformed or malicious USB-related input can corrupt heap memory and redirect execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an existing authenticated local session with at least standard user (low-privilege) access on the target Windows machine - consistent with CVSS PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.8 (High) is well-calibrated for a local privilege escalation: AV:L limits the attack surface to hosts where the adversary already has a foothold, but AC:L and PR:L mean any standard user account on a vulnerable Windows machine is sufficient - no elevated privileges or complex setup required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch via Windows Update or WSUS: the fixed build versions are 10.0.19044.7725 (Win10 21H2), 10.0.19045.7725 (Win10 22H2), 10.0.22631.7582 (Win11 23H2), 10.0.26100.9445/10.0.26100.33438 (Win11 24H2/Server 2025), 10.0.26200.9445 (Win11 25H2), 10.0.28000.2954 (Win11 26H1), and 10.0.20348.5622 (Server 2022). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit your infrastructure to identify all Windows 10, Windows 11, and Windows Server systems and prioritize those with elevated network access or sensitive data. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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