EUVD-2026-73246
GHSA-rmmw-r8mj-6fj4
Severity by source
AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Local administrator required (PR:H) to reach the secure kernel interface; scope change (S:C) reflects VTL0-to-VTL1 boundary crossing with full impact on VBS enclave.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Integer overflow or wraparound in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Secure Kernel Mode enables a locally authenticated administrator to breach the virtualization-based security (VBS) trust boundary separating VTL0 (normal OS) from VTL1 (secure enclave). The root cause is CWE-190 integer overflow that leads to a buffer overflow condition within secure kernel processing, affecting Windows 10, Windows 11, and Windows Server across a broad range of release versions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a locally authenticated account with administrator-level (high) privileges on the target Windows system - the CVSS PR:H metric confirms this prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.2 score accurately captures a meaningful but contextually bounded risk: AV:L restricts exploitation to actors with existing local access, and PR:H confirms that a fully privileged (administrator-level) account is required before the overflow can be triggered - meaning this is not an entry-point vulnerability but a post-compromise escalation path. … 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 patches immediately via Windows Update or WSUS; exact target builds per platform are: Windows 10 1607/Server 2016 → 10.0.14393.9512, Windows 10 1809/Server 2019 → 10.0.17763.9245, Windows 10 21H2 → 10.0.19044.7725, Windows 10 22H2 → 10.0.19045.7725, Windows 11 23H2 → 10.0.22631.7582, Windows 11 24H2/Server 2025 → 10.0.26100.9445 (client) / 10.0.26100.33438 (server), Windows 11 25H2 → 10.0.26200.9445, Windows 11 26H1 → 10.0.28000.2954, Server 2022 → 10.0.20348.5622. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, enumerate all Windows 10, Windows 11, and Windows Server systems and identify those using virtualization-based security features. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Buffer Overflow
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External POC / Exploit Code
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