CVE-2026-65777

Published: Aug 11, 2026Modified: Aug 14, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Exploitability: 1.6 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Inadequate encryption strength in Windows Active Directory allows an authorized attacker to bypass a security feature over a network.

Affected (10)

Products: Microsoft: Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2022, Windows Server 2025

6 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2022

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	Before 10.0.22631.7517
Microsoft Windows 11 23h2	Before 10.0.22631.7517
Microsoft Windows 11 24h2	Before 10.0.26100.9106
Microsoft Windows 11 24h2	Before 10.0.26100.9106
Microsoft Windows 11 25h2	Up to 10.0.26200.9106
Microsoft Windows 11 25h2	Before 10.0.26200.9106
Microsoft Windows 11 26h1	Before 10.0.28000.2704
Microsoft Windows 11 26h1	Before 10.0.28000.2704
Microsoft Windows Server 2022	Before 10.0.20348.5440
Microsoft Windows Server 2025	Before 10.0.26100.33222

Related CWEs

Inadequate Encryption Strength

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.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65777

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

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