CVE-2026-83885
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Inadequate Encryption Strength in Windows VBS Enclave

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Inadequate encryption strength in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to perform spoofing locally.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-83885
EUVD
EUVD-2026-99406

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-326 The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.

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Executive Summary

This vulnerability involves inadequate encryption strength in Windows Virtualization-Based Security (VBS) Enclave. An authorized attacker could exploit this to perform spoofing attacks locally.

Impact Analysis

An attacker with local access could impersonate legitimate users or services, potentially gaining unauthorized access to sensitive data or systems.

Compliance Impact

This vulnerability allows local spoofing due to weak encryption in Windows VBS Enclave. Such weaknesses may lead to unauthorized access or data tampering, which could violate compliance requirements for data integrity and protection under standards like GDPR and HIPAA.

Mitigation Strategies

Apply the latest security updates from Microsoft to address the inadequate encryption strength in Windows VBS Enclave. Monitor Microsoft's update guide for patches specific to your system versions.

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