EUVD-2026-73921
GHSA-qm68-4627-wr66
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Low-privileged local attacker triggers untrusted dereference in VBS Enclave with no user interaction; full C/I/A impact reflects complete privilege escalation to SYSTEM.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Virtualization-Based Security (VBS) Enclave exposes authenticated local attackers to full system compromise via an untrusted pointer dereference (CWE-822). Affected platforms include Windows 11 versions 23H2 through 26H1 and Windows Server 2025 in both standard and Server Core configurations, with Microsoft confirming a patch is available. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local user account (standard/low-privileged) on a Windows 11 or Windows Server 2025 system with VBS Enclave functionality present and active. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 base score (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately represents the threat profile: exploitation is strictly local and requires a low-privileged authenticated session, which meaningfully limits the attack surface relative to network-exploitable vulnerabilities. … 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 CVE-2026-83498 immediately via Windows Update, WSUS, or Microsoft Update Catalog; the patched build thresholds are 10.0.22631.7582 for Windows 11 23H2, 10.0.26100.9445 for Windows 11 24H2, 10.0.26100.33438 for Windows Server 2025 (both editions), 10.0.26200.9445 for Windows 11 25H2, and 10.0.28000.2954 for Windows 11 26H1, all documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83498. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Asset owners must identify all Windows 11 (versions 23H2 through 26H1) and Windows Server 2025 systems, categorize by criticality, and assess local user access controls. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Windows 11 23h2
View allInternet Shortcut Files Security Feature Bypass Vulnerability. Rated high severity (CVSS 8.1), this vulnerability is rem
Windows Kernel contains a TOCTOU race condition vulnerability allowing local privilege escalation, exploited by the OilR
Windows Internet Shortcut Files (.url) contain an external control vulnerability (CVE-2025-33053, CVSS 8.8) that enables
Windows SMB contains an improper access control vulnerability (CVE-2025-33073, CVSS 8.8) enabling authenticated attacker
Windows Kernel Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack co
Active Directory Domain Services contains an elevation of privilege vulnerability that allows authenticated domain users
Windows Kernel-Mode Driver Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is l
Windows MSHTML Platform Spoofing Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitab
Microsoft Scripting Engine contains a type confusion vulnerability allowing unauthorized remote code execution over the
Windows Task Scheduler Elevation of Privilege Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is low a
Windows SmartScreen Security Feature Bypass Vulnerability. Rated high severity (CVSS 7.6), this vulnerability is remotel
Symlink following (CWE-59) in the Windows Update Stack enables a locally authenticated attacker with standard user privi
Same weakness CWE-822 – Untrusted Pointer Dereference
View allShare
External POC / Exploit Code
Leaving vuln.today