Vulnerability in Microsoft Windows_server_2008
CVE-2026-20833
Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.
Vulnerability class: POODLE (CVE-2014-3566)
EPSS: 0.004 (28.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Microsoft Windows_server_2008 — versions r2
- Microsoft Windows Server 2008 R2 Service Pack 1 — versions 6.1.7601.0
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core Installation) — versions 6.1.7601.0
- Microsoft Windows Server 2008 Service Pack 2 — versions 6.0.6003.0
- Microsoft Windows Server 2008 Service Pack 2 (Server Core Installation) — versions 6.0.6003.0
- Microsoft Windows Server 2012 — versions 6.2.9200.0
- Microsoft Windows_server_2012 — versions r2
- Microsoft Windows Server 2012 R2 — versions 6.3.9600.0
- Microsoft Windows Server 2012 R2 (Server Core Installation) — versions 6.3.9600.0
- Microsoft Windows Server 2012 (Server Core Installation) — versions 6.2.9200.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20833?
- CVE-2026-20833 is a medium-severity vulnerability in Microsoft Windows_server_2008, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 5.5/10. Published 2026-01-13.
- How severe is CVE-2026-20833?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2026-20833 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.