CVE-2026-20833

Published: Jan 13, 2026Modified: Jun 17, 2026

5.5

Vector

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

Exploitability: 1.8 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.

Affected (10)

Products: Microsoft: Windows Server 2008, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025

7 products

Windows Server 2008

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2022 23h2

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows Server 2008	All versions
Microsoft Windows Server 2008	All versions
Microsoft Windows Server 2008	Version r2 sp1
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.8783
Microsoft Windows Server 2019	Before 10.0.17763.8276
Microsoft Windows Server 2022	Before 10.0.20348.4648
Microsoft Windows Server 2022 23h2	Before 10.0.25398.2092
Microsoft Windows Server 2025	Before 10.0.26100.32230

Related CWEs

Use of a Broken or Risky Cryptographic Algorithm

The product uses a broken or risky cryptographic algorithm or protocol.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20833

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.