CVE-2017-0159
A security feature bypass vulnerability exists in Windows 10 1607, Windows Server 2012 R2, and Windows 2016 when ADFS incorrectly treats requests coming from Extranet clients as Intranet requests, aka "ADFS Security Feature Bypass Vulnerability."
Does this matter?
Lower severity and a low EPSS score (3.65%). Track it; it rarely justifies an emergency change on its own.
Description
A security feature bypass vulnerability exists in Windows 10 1607, Windows Server 2012 R2, and Windows 2016 when ADFS incorrectly treats requests coming from Extranet clients as Intranet requests, aka "ADFS Security Feature Bypass Vulnerability."
- CVSS 3.0
- 3.7 LOWCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 3.65% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- microsoft/windows 10 · microsoft/windows server 2012 · microsoft/windows server 2016
- Source
- secure@microsoft.com
EPSS moved from 4.9% on 21 September 2026 to 3.6% on 27 October 2026.
References
- http://www.securityfocus.com/bid/97449Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038243
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0159Patch, Vendor Advisory
- http://www.securityfocus.com/bid/97449Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038243
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0159Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.