Information Disclosure Vulnerability in Windows Kerberos by Microsoft
CVE-2026-20833

5.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Windows Server 2008 R2 Service Pack 1
Windows Server 2008 R2 Service Pack 1 (server Core Installation)
Windows Server 2008 Service Pack 2
Windows Server 2008 Service Pack 2 (server Core Installation)
Vendor
CVE Published:
13 January 2026

What is CVE-2026-20833?

A vulnerability in Windows Kerberos arises from the use of a broken or risky cryptographic algorithm, potentially enabling an authorized attacker to gain local access to sensitive information. This issue underscores the need for timely updates and robust security measures to safeguard against data breaches.

Affected Version(s)

Windows Server 2008 R2 Service Pack 1 (Server Core installation) x64-based Systems 6.1.7601.0 < 6.1.7601.28117

Windows Server 2008 R2 Service Pack 1 x64-based Systems 6.1.7601.0 < 6.1.7601.28117

Windows Server 2008 Service Pack 2 (Server Core installation) 32-bit Systems 6.0.6003.0 < 6.0.6003.23717

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.