CVE-2018-8340

At a glance

Severity: Not available
EPSS: EPSS 7.89 % · percentile 95 (2026-10-27)
State: PUBLISHED
Published: 2018-08-15
Updated: 2024-08-05
Assigner: microsoft
NVD status: Modified

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.0	MEDIUM 6.5	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	NVD · nvd@nist.gov (Primary)
CVSS 2.0	MEDIUM 4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2018-19991
GCVE · GCVE-0-2018-8340

CERT-FR advisories

CERTFR-2018-AVI-397 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1709:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1803:*:*:*:*:*:*:*

Affected products

Product	Versions
Microsoft · Windows Server 2016	affected (Server Core installation)
Microsoft · Windows Server 2012 R2	affected (Server Core installation)
Microsoft · Windows 10 Servers	affected version 1709 (Server Core Installation) ; affected version 1803 (Server Core Installation)

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD