EUVD-2026-73461
GHSA-68rq-x29q-vhwj
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel UAF requiring heap-grooming precision (AC:H); low-privileged account needed (PR:L); full kernel impact on exploit success (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Win32K (the kernel-mode graphics subsystem) allows a low-privileged authenticated user to gain SYSTEM-level access by triggering a use-after-free condition. Affected across a wide span of Windows desktop and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local authenticated session on the target system with at least low-privilege user rights (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.0 (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately captures the threat model: exploitation is local-only, requires a pre-existing low-privileged account, and demands high complexity - likely a race-condition window or heap-grooming sequence. … 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 releasing patched builds for each affected Windows version: Windows 10 22H2 → 10.0.19045.7725, Windows 11 24H2/25H2 → 10.0.26100.9445 or 10.0.26200.9445, Windows Server 2025 → 10.0.26100.33438, and corresponding builds per the full version matrix in EUVD-2026-73461. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Windows 10 (1607 forward), Windows 11, and Windows Server systems (2012-2025) and prioritize those with multiple users or remote access. …
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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