EUVD-2026-44130
GHSA-m9vx-86m5-mp2h
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and low-priv foothold (AV:L/PR:L); use-after-free needs a race so AC:H; SYSTEM-level compromise gives full C/I/A with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft's Windows USB Print Driver stems from a use-after-free (CWE-416) memory corruption flaw affecting Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025. A low-privileged authenticated attacker who can execute code on the host and win a memory-timing race can corrupt kernel memory to gain higher (SYSTEM-level) privileges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already have a local, authenticated low-privileged account (PR:L) and the ability to execute code on the target host; there is no remote or unauthenticated path (AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals point to a real but not top-tier priority issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already obtained a low-privileged account on a Windows 11 24H2/25H2/26H1 or Server 2025 host - for example via phishing, a compromised service account, or a shared kiosk - runs a local program that rapidly allocates and frees print-driver objects to trigger the use-after-free and win the timing race. On success the stale pointer is reused to corrupt kernel memory and execute code at SYSTEM, giving full control of the machine. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50674 (Patch available per vendor advisory) as delivered through Windows Update / WSUS for each affected SKU; the exact patched build numbers are published at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50674 - install the cumulative update for your Windows 11 servicing branch (24H2, 25H2, or 26H1) or Windows Server 2025. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 systems and identify those with active USB Print Driver usage; flag systems supporting sensitive workloads or administrative functions for prioritized patching. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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