Microsoft Active Directory Federation Services (AD FS) 2.0, 2.1, and 3.0, when a configured SAML Relying Party lacks a sign-out endpoint, does not properly process logoff actions, which makes it easier for remote attackers to obtain access by leveraging an unattended workstation, aka "Active Directory Federation Services Information Disclosure Vulnerability."
Conclusion & alert: CVE-2014-6331 is rated Moderate Risk (49/100): CVSS Medium severity, with high exploitation likelihood (EPSS 20.32%, 97th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 33.60% | 20.32% | -13.28% |
| 2 | 2025-03-30 | 47.46% | 33.60% | -13.86% |
| 3 | 2025-03-29 | — | 47.46% | — |
Full EPSS history (12 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | active_directory_federation_services | 2.1 | cpe:2.3:a:microsoft:active_directory_federation_services:2.1:*:*:*:*:*:*:* |
| microsoft | active_directory_federation_services | 2.0 | cpe:2.3:a:microsoft:active_directory_federation_services:2.0:*:*:*:*:*:*:* |
| microsoft | active_directory_federation_services | 3.0 | cpe:2.3:a:microsoft:active_directory_federation_services:3.0:*:*:*:*:*:*:* |