CVE-2026-105008
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Microsoft Schannel Spoofing Vulnerability

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
No cwe for this issue in Windows Schannel allows an unauthorized attacker to perform spoofing over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-16
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-105008
EUVD
EUVD-2026-100397

Affected Vendors & Products

Showing 21 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
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 2012 6.2.9200.0
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0
Microsoft Windows Server 2012 R2 6.3.9600.0
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
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-420 The product protects a primary channel, but it does not use the same level of protection for an alternate channel.
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

Attack-Flow Graph

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Executive Summary

This vulnerability in Windows Schannel allows an unauthorized attacker to perform spoofing over a network. Spoofing involves impersonating a trusted entity to gain unauthorized access or deceive systems.

Impact Analysis

An attacker could exploit this to impersonate a legitimate service or user, potentially gaining access to sensitive data, executing unauthorized actions, or bypassing security controls. Systems using affected Windows versions are at risk.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance penalties if systems are not patched.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows and Windows Server systems to address the Schannel spoofing vulnerability.

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