EUVD-2026-56380
GHSA-6jcr-mpr9-gxh7
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low-privilege account required; AC:H reflects timing-dependent use-after-free kernel heap exploitation; full C/I/A impact matches kernel-level code execution achieving SYSTEM.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows Graphics Kernel exposes a use-after-free condition that allows a low-privileged local user to achieve SYSTEM-level code execution. Affected products span Windows 10, Windows 11, and Windows Server 2016 through 2025 across 15 distinct version ranges, making the blast radius extremely broad. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a low-privileged local account with the ability to initiate an interactive or remote (e.g., RDP) session on the target system - this is confirmed by CVSS PR:L and AV:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H accurately represents the threat model: local access with a low-privileged account is required, but the high attack complexity (AC:H) signals a reliability barrier - likely a race condition or precise heap grooming requirement inherent to use-after-free kernel 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 vendor-released patch immediately via Windows Update or the Microsoft Update Catalog, referencing the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62774 for per-version fix build numbers. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server 2016-2025 systems to establish a complete patching baseline. …
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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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