EUVD-2026-56631
GHSA-252p-v82q-x7x4
Severity by source
AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Physical access is the binding prerequisite (AV:P); no credentials needed (PR:N); high complexity reflects precise timing or hardware state requirement; full C/I/A from kernel-level compromise with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.
AnalysisAI
Privilege escalation via use-after-free in the Windows Kernel affects Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025, requiring physical device access to exploit. An attacker with physical proximity can trigger kernel memory corruption under high-complexity conditions to gain full control of the affected system, achieving complete confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires physical presence at the target device (AV:P) - the attacker must be able to interact with the machine directly, whether via the keyboard, a connected peripheral, or a DMA-capable hardware interface. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.4 score with vector AV:P/AC:H/PR:N/UI:N reflects a meaningful practical constraint: physical presence at the device is mandatory, and the high attack complexity (AC:H) indicates precise timing or specific hardware conditions must be met, reducing opportunistic exploitation likelihood. … 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 Microsoft's cumulative update packages to reach the following fixed builds: Windows 11 24H2 must reach build 10.0.26100.9168 or later, Windows 11 25H2 must reach 10.0.26200.9168 or later, Windows 11 26H1 must reach 10.0.28000.2704 or later, and Windows Server 2025 (both full and Server Core) must reach 10.0.26100.33296 or later, per the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62708. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-416 – Use After Free
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External POC / Exploit Code
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