EUVD-2026-73579
GHSA-6mmq-pxrc-gc8w
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack requiring low-privileged account (AV:L/PR:L) with high-complexity heap manipulation (AC:H); full C/I/A from SYSTEM-level privilege escalation, scope unchanged.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation through a use-after-free condition in the Windows Win32K kernel subsystem allows a low-privileged local attacker to achieve SYSTEM-level access across a wide range of Windows client and server releases, from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. The flaw resides in win32k.sys, the kernel-mode driver implementing the Windows graphical subsystem (GDI/USER32), and requires high attack complexity to trigger reliably - consistent with race-condition or heap-grooming exploitation techniques. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged local account (PR:L per CVSS) with the ability to execute code on the target Windows system - the attack vector is strictly local (AV:L), ruling out remote unauthenticated exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.0 accurately reflects the practical exploitation barrier: AV:L (local code execution required) and AC:H (high complexity, implying race conditions or heap grooming) significantly narrow the attacker pool, even though the C:H/I:H/A:H triad reflects a complete compromise of the machine's privilege model upon successful exploitation. … 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 for the affected Windows version as documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69652. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10 (version 1607 and later), Windows 11, and Windows Server (2016-2025) systems in your environment and assess local-access exposure by role and data sensitivity; prioritize servers and high-value workstations. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
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