EUVD-2026-73223
GHSA-842p-8p3g-m3hg
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local UAF requiring race-condition timing (AC:H), low-privileged account mandatory (PR:L), full kernel compromise on success (C:H/I:H/A:H), no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via use-after-free in the Windows Win32K kernel subsystem allows a low-privileged local attacker to gain full system control on Windows 11 versions 24H2, 25H2, and 26H1. Exploitation requires high attack complexity, consistent with a race-condition-class UAF, but no user interaction is needed once the attacker has local code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to already possess a low-privileged local user account on the target system (PR:L) and the ability to execute code in that context, ruling out purely remote, unauthenticated scenarios. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.0 with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H accurately reflects a local, authenticated, high-complexity exploit with full impact upon success. … 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 cumulative update that brings Windows 11 24H2 to build 10.0.26100.9445 or later, 25H2 to build 10.0.26200.9445 or later, and 26H1 to build 10.0.28000.2954 or later, as documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69333. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 11 systems running versions 24H2, 25H2, or 26H1 and confirm Microsoft patch availability through Windows Update or WSUS. …
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
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