SEPTEMBER 13, 2026
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Case File

CVE-2026-56155

HIGH · CVSS 7.8 EPSS 2.33% CISA KEV · Actively Exploited

Source: NVD + CISA KEV + EPSS · Published 2026-07-14 · Last synced 2026-08-13

CyberRota Analysis

AI-Generated

Active Directory Federation Services (AD FS) is vulnerable due to insufficient granularity of access control, enabling an authorized attacker to elevate their privileges locally. This flaw poses a significant risk as it can lead to unauthorized access to sensitive resources and data within the network. Organizations utilizing AD FS should prioritize remediation efforts to mitigate potential exploitation of this vulnerability.

CISA KEV Details

Status: This CVE is listed in CISA's Known Exploited Vulnerabilities catalog.

Ransomware use: Unknown

Added to KEV: 2026-07-14

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CVE
CVE-2026-56155
Severity
HIGH
CVSS
7.8
EPSS
2.33%

Original NVD Description

Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.

Related CVEs

Other vulnerabilities affecting the same vendor(s)