EUVD-2026-73691
GHSA-57ff-56gx-qwgx
Severity by source
AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Local access with low privilege required; AC:H reflects UAF race-condition timing; S:C captures privilege escalation beyond the shell process boundary.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Shell allows an authorized attacker to elevate privileges locally.
AnalysisAI
Use-after-free in Windows Shell enables local privilege escalation on Windows 11 and Windows Server 2025, allowing a low-privileged authenticated user to elevate to SYSTEM or equivalent. The CVSS scope change (S:C) indicates the impact extends beyond the exploited shell component to the broader OS. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated local session on an affected Windows 11 or Windows Server 2025 system (PR:L per CVSS - a standard, non-administrative user account suffices). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 reflects a local, high-complexity, low-privilege exploit path with scope change and full C/I/A impact - a typical local-privilege-escalation profile. … 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 Microsoft security update released for this vulnerability, which brings affected systems to the following patched builds: Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11 24H2/25H2 to 10.0.26100.9445 or later, Windows 11 26H1 to 10.0.28000.2954 or later, and Windows Server 2025 (including Server Core) to 10.0.26100.33438 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows 11 and Windows Server 2025 systems in your environment and notify infrastructure teams of the vulnerability. …
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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
Leaving vuln.today