EUVD-2026-73549
GHSA-xm8g-vgqh-4gmf
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access only (AV:L), race condition required (AC:H), low-privilege authenticated user needed (PR:L); full C/I/A impact reflects SYSTEM-level privilege escalation on success.
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
Privilege escalation in Windows Shell on Windows 11 (versions 23H2 through 26H1) and Windows Server 2025 stems from a use-after-free memory corruption flaw (CWE-416). An authenticated local attacker who triggers the race-condition-sensitive bug can achieve full system compromise with C:H/I:H/A:H impact, yielding effective SYSTEM-level control. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local, authenticated session with at least standard user (non-administrator) privileges - the CVSS PR:L metric confirms this minimum access requirement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a local privilege escalation path requiring an authenticated foothold and high exploitation complexity, most likely a race condition in shell object lifecycle management. … 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-released patch through Windows Update or WSUS targeting the following minimum confirmed build versions: Windows 11 24H2 to 10.0.26100.9445 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11 25H2 to 10.0.26200.9445 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, as documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69606. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 11 (23H2-26H1) and Windows Server 2025 systems in your environment, prioritizing critical infrastructure and domain-joined machines. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today