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Fencer Vulns
high 7.5

CVE-2019-1006 json

An authentication bypass vulnerability exists in Windows Communication Foundation (WCF) and Windows Identity Foundation (WIF), allowing sig…

published 2019-07-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-9592

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.1%
EPSS 6.1% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

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'.

Patch / fix

Exploit prediction

6.07% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • Microsoft Windows
  • Microsoft Windows Server
  • Microsoft Microsoft SharePoint Foundation
  • Microsoft Microsoft .NET Framework 4.5.2
  • Microsoft Microsoft .NET Framework 4.6
  • Microsoft Microsoft SharePoint Enterprise Server
  • Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2
  • Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft SharePoint Server
  • Microsoft Windows 10 Version 1903 for 32-bit Systems
  • Microsoft Windows 10 Version 1903 for x64-based Systems
  • Microsoft Windows 10 Version 1903 for ARM64-based Systems
  • Microsoft Windows Server, version 1903 (Server Core installation)
  • Microsoft Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1
  • Microsoft Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)
  • Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2
  • Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for x64-based Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems
  • Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
  • Microsoft Microsoft.IdentityModel
  • Microsoft Microsoft .NET Framework 3.5
  • Microsoft Microsoft .NET Framework 3.0
  • Microsoft Microsoft .NET Framework 2.0

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.