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Vulnerability record · CVE-2019-1006 · published 15 July 2019

CVE-2019-1006: Microsoft .net framework improper certificate validation vulnerability

Microsoft · .Net Framework

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'.

7.5 CVSS 3.0 High EPSS 6.0% · top 6.9% CWE-295 · Improper certificate validation
7.5CVSS 3.0 base score, v2 5.0
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
13Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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'.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

13 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1006 PatchVendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1006 PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-1006), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.