CVE-2026-83906: medium-severity vulnerability in Microsoft Windows 11 version 23H2
Windows Shell Spoofing Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 1.0%
Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 11 version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows 11 Version 26H2Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)Related CVEs — Microsoft Windows 11 version 23H2
In the same product, most dangerous first.
CVE-2025-33053HIGHInternet Shortcut Files Remote Code Execution VulnerabilityEPSS 87.0%KEVCVE-2024-43451MEDIUMNTLM Hash Disclosure Spoofing VulnerabilityEPSS 84.3%KEVCVE-2025-33073HIGHWindows SMB Client Elevation of Privilege VulnerabilityEPSS 82.7%KEVCVE-2026-33824CRITICALWindows Internet Key Exchange (IKE) Service Extensions Remote Code Execution VulnerabilityEPSS 77.1%KEVCVE-2026-32202MEDIUMWindows Shell Spoofing VulnerabilityEPSS 70.9%KEVCVE-2024-30088HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 68.2%KEV