Description
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
Published: 2026-09-08
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Local Privilege Escalation
Action: Immediate Patch
AI Analysis

Impact

Untrusted pointer dereference occurs inside a Windows Virtualization-Based Security enclave, allowing a local or authorized attacker to elevate privileges locally. The flaw enables privilege escalation from a lower level to a higher privileged context, effectively bypassing the isolation intended by the Virtualization-Based Security feature. This is categorised as a classic Local Privilege Escalation weakness with CWE-822.

Affected Systems

Microsoft Windows 11 releases 23H2, 24H2, 25H2, and 26H1, as well as Windows Server 2025 (including Server Core installations) are affected by the vulnerability.

Risk and Exploitability

The CVSS score of 7.8 indicates a high impact and moderate exploitation complexity for a local attacker. External Threat Probability (EPSS) is not available, so the likelihood cannot be precisely quantified; however, the vulnerability is not listed in CISA KEV, implying no known widespread exploitation. Access requires local, authorized roles, indicating that an insider or a compromised local account could exploit the flaw to gain elevated privileges.

Generated by OpenCVE AI on September 9, 2026 at 03:05 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Microsoft security patch that includes the fix for CVE-2026-83498.
  • Update all affected Windows 11 and Windows Server 2025 installations to the newest cumulative update that addresses the CVE.
  • If the patch cannot be applied immediately, tighten local account controls and enforce least‑privilege permissions until the update is applied.

Generated by OpenCVE AI on September 9, 2026 at 03:05 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 10 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft windows Server 2025 (server Core Installation)

Thu, 10 Sep 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
CPEs cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
Vendors & Products Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1

Wed, 09 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
Title Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2025
Weaknesses CWE-822
CPEs cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Windows 11 23h2 Windows 11 23h2 Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 Windows 11 25h2 Windows 11 26h1 Windows 11 26h1 Windows Server 2025 Windows Server 2025 (server Core Installation)
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-25T21:39:17.627Z

Reserved: 2026-08-31T15:57:21.153Z

Link: CVE-2026-83498

cve-icon Vulnrichment

Updated: 2026-09-09T16:17:28.235Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:21:04.243

Modified: 2026-09-10T15:01:25.240

Link: CVE-2026-83498

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T20:45:17Z

Weaknesses
  • CWE-822

    Untrusted Pointer Dereference