EUVD-2026-73010
GHSA-23g5-h9jw-g67q
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with a low-privileged account suffices; AC:L and UI:N reflect no complexity or interaction barriers to full SYSTEM-level C/I/A impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Missing authentication for critical function in Windows Shell allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Shell affects Windows 11 (versions 23H2 through 26H1) and Windows Server 2025, enabling a locally authenticated low-privileged attacker to achieve full system compromise with no user interaction required. The root cause is CWE-306 - a critical internal Shell function that lacks an authentication or authorization gate, allowing a standard user account to invoke privileged operations and elevate to SYSTEM. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | A low-privileged local user account on an affected Windows 11 or Windows Server 2025 build is the only prerequisite - consistent with CVSS PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High rating accurately reflects a local, low-complexity privilege escalation with no user interaction - a class consistently prioritized in enterprise patch cycles. … 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 immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows 11 (23H2-26H1) and Windows Server 2025 systems in production and assess patch management readiness. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
Same technique Authentication Bypass
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External POC / Exploit Code
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