CVE-2026-83501

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Windows VBS Enclave

Publication date: 2026-09-08

Last updated on: 2026-09-10

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-83501

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_23h2	to 10.0.22631.7582 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7582 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9445 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9445 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9445 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9445 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2954 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2954 (exc)
microsoft	windows_server_2025	to 10.0.26100.33438 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read flaw in Windows Virtualization-Based Security (VBS) Enclave. It allows an authorized attacker with local access to read beyond the intended memory boundaries, potentially exposing sensitive information.

Impact Analysis

An attacker could exploit this to disclose confidential data stored in memory, such as credentials or encryption keys. Since it requires local access, physical or network-based compromise is needed first.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance penalties if exploited due to inadequate memory protection.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Virtualization-Based Security (VBS) Enclave vulnerability. Monitor Microsoft's security advisories for patches and follow their recommended mitigation steps.

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