CVE-2018-8340

6.5 mediumEPSS 7.9%

Medium (6.5) in microsoft. EPSS 7.9% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists when Active Directory Federation Services (AD FS) improperly handles multi-factor authentication requests, aka "AD FS Security Feature Bypass Vulnerability." This affects Windows Server 2016, Windows Server 2012 R2, Windows 10 Servers.

Severity

CVSS 3.0

6.5 medium

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

EPSS: 7.9% chance of exploitation in the next 30 days; higher than 94% of CVEs (scores of 2026-10-31)
Published: 2018-08-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

microsoft:windows_server_2012
microsoft:windows_server_2016

References

http://www.securityfocus.com/bid/105029
http://www.securitytracker.com/id/1041474
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8340
http://www.securityfocus.com/bid/105029
http://www.securitytracker.com/id/1041474

Check your stack JSON