Inadequate Encryption Strength in Microsoft Windows and Windows Server - CVE-2026-83885
Published: October 14, 2026
Vulnerability identifier: #VU155030
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-83885
CWE-ID: CWE-326
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform spoofing.
The vulnerability exists due to inadequate encryption strength in Windows Virtualization-Based Security (VBS) Enclave when using the enclave locally. A local user can exploit the encryption weakness locally to perform spoofing.
Successful exploitation requires a deep understanding of the system and depends on factors that may include the environment, system configuration, and additional security measures.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-83885
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231
Windows Server - addressed in versions 2022 10.0.20348.5761, 2025 10.0.26100.33650
Windows Server - addressed in versions 2022 10.0.20348.5761, 2025 10.0.26100.33650