EUVD-2026-73250
GHSA-f5vw-8xgv-533c
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector with low-privilege authentication confirmed; AC:H reflects documented complexity prerequisite; full C/I/A justified by SYSTEM-level privilege escalation on the vulnerable host.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Incorrect authorization in Windows Win32K allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Win32K allows an authenticated low-privileged user to gain SYSTEM-level access across virtually all supported and legacy Windows versions. The flaw stems from incorrect authorization checks (CWE-863) in the Win32K kernel-mode subsystem, enabling a local attacker to bypass privilege boundaries with no user interaction required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local, authenticated session with at minimum low-privilege user rights (PR:L) - a standard Windows domain or local user account with interactive, RDP, or existing code execution access satisfies this prerequisite. … 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) reflects a high-complexity local exploitation path with full confidentiality, integrity, and availability impact on the vulnerable system. … 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 Patch Tuesday security update bringing each affected Windows version to or above the fixed builds listed in EUVD-2026-73250 (e.g., Windows Server 2025 to 10.0.26100.33438, Windows 11 24H2 to 10.0.26100.9445, Windows 10 22H2 to 10.0.19045.7725). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, acquire and stage the Windows security patch for CVE-2026-70283 from the latest Microsoft security update release; prioritize deployment to domain-joined workstations and production servers handling sensitive data. …
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Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
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