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Public proof of conceptFix available

CVE-2019-1006

A public proof of concept exists; no exploitation attested.

  • Published2019-07-15
  • WeaknessCWE-295

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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'.

Timeline

dates in UTC
  1. 2019-07-1519:15CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-1006?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-1006?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft .net frameworkversion to verify
BranchAffectedFixed in
2.0= 2.0no fix published
3.0= 3.0no fix published
3.5= 3.5no fix published
4.7= 4.7.2no fix published
4.8= 4.8no fix published
3.5= 3.5.1no fix published
4.5= 4.5.2no fix published
4.6= 4.6no fix published
4.6= 4.6.1no fix published
4.6= 4.6.2no fix published
4.7= 4.7no fix published
4.7= 4.7.1no fix published
Microsoft windows 10
BranchAffectedFixed in
—all versionsno fix published
1607.x= 1607no fix published
1703.x= 1703no fix published
1709.x= 1709no fix published
1803.x= 1803no fix published
1809.x= 1809no fix published
1903.x= 1903no fix published
Microsoft windows server 2016
BranchAffectedFixed in
—all versionsno fix published
1803.x= 1803no fix published
1903.x= 1903no fix published

10 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverified521526/CVE-2019-1006
PoC-in-GitHub

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-295read 2026-10-23
  • FIRST EPSSEPSS score6.1 %2026-10-22
  • PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2019-07-15
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2019-1006?

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'.

Is CVE-2019-1006 actively exploited?

Active exploitation of CVE-2019-1006 has not been confirmed. Its EPSS score was 6.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-1006?

CVE-2019-1006 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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