EUVD-2026-43823
GHSA-92wq-88hv-346f
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-priv attacker (AV:L/PR:L) must win a timing race (AC:H) with no user interaction; successful escalation yields full SYSTEM impact (C:H/I:H/A:H), scope unchanged.
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
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows USB Print Driver on Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 allows an already-authenticated local user to win a timing race and elevate to SYSTEM-level privileges. The flaw is a race condition (CWE-362) reported by Microsoft; a vendor patch is available, and there is no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already have a valid low-privileged local account and the ability to execute code on the target (CVSS PR:L, AV:L) - this is not remotely exploitable and requires no user interaction (UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but not top-tier priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A low-privileged user (or malware running in that user's context) on a Windows 11 24H2/25H2/26H1 or Windows Server 2025 host runs a program that repeatedly triggers USB print driver operations while racing a second thread to manipulate shared driver state at the exact vulnerable moment. After enough attempts to win the timing window, the attacker corrupts the privileged code path and executes code as SYSTEM, achieving full control of the machine. … |
| Remediation | Apply the Microsoft security update for CVE-2026-49802; the input confirms a patch is available from the vendor, and details (including the specific fixed KB per Windows build) are published at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49802 - treat this as the primary and definitive fix (Patch available per vendor advisory; no independent exact fixed-version string was provided in the input, so confirm the KB from MSRC). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 systems in your environment and assess which users have local access rights. …
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
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External POC / Exploit Code
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