CVE-2018-0833: Microsoft Windows 8.1

Medium severity, CVSS 5.3. EPSS: 39.9% chance of exploitation in the next 30 days.

The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka "SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability".

Affected products

• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2012: version r2 only

Published 2018-02-15. Last modified 2026-06-17.