CVE-2026-83885

Analyzed Analyzed - Analysis Complete

Inadequate Encryption Strength in Windows VBS Enclave

Publication date: 2026-10-13

Last updated on: 2026-10-21

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

2026-10-21

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-83885

EUVD

EUVD-2026-99406

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

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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