EUVD-2026-73606
GHSA-w7x5-4967-jhm8
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:L because exploitation requires local code execution; AC:H for the race condition timing requirement; PR:L as a low-privilege account is needed; full C/I/A for kernel-level SYSTEM compromise.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Time-of-check time-of-use (toctou) race condition in Windows Win32K allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Win32K allows a low-privileged authenticated attacker to achieve full SYSTEM-level code execution via a time-of-check time-of-use (TOCTOU) race condition in the kernel graphics subsystem. The vulnerability spans an exceptionally broad range of Microsoft Windows versions - from Windows Server 2012 through Windows Server 2025 and Windows 10/11 across all current servicing branches - making patch deployment a significant operational undertaking. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privilege authenticated local user account on the target Windows system (PR:L per CVSS vector) - remote unauthenticated exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.0 with AC:H accurately reflects that winning a race condition requires precise timing and typically multiple attempts, reducing reliability compared to a deterministic memory corruption exploit. … 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 patches via Windows Update or WSUS targeting the build thresholds listed per affected version (see MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69779 for per-product KB article numbers). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems across the organization (Windows Server 2012 or later, Windows 10/11 in any servicing branch) and assess patch management readiness. …
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External POC / Exploit Code
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