CVE-2019-1006: Microsoft .NET Framework

High severity, CVSS 7.5. EPSS: 6% chance of exploitation in the next 30 days.

An authentication bypass vulnerability exists in Windows Communication Foundation (WCF) and Windows Identity Foundation (WIF), allowing signing of SAML tokens with arbitrary symmetric keys, aka 'WCF/WIF SAML Token Authentication Bypass Vulnerability'.

Affected products

• Microsoft .NET Framework: version 2.0 only; version 3.0 only; version 3.5 only; version 4.7.2 only; version 4.8 only; version 3.5.1 only; …
• Microsoft Identitymodel: version 7.0.0 only
• Microsoft SharePoint Enterprise Server: version 2013 only; version 2016 only
• Microsoft SharePoint Foundation: version 2010 only; version 2013 only
• Microsoft SharePoint Server: version 2019 only
• Microsoft Windows 10: affected versions not specified; version 1607 only; version 1703 only; version 1709 only; version 1803 only; version 1809 only; …
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified; version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: affected versions not specified; version 1803 only; version 1903 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2019-07-15. Last modified 2026-06-17.