Is CVE-2026-56155 in the CISA KEV catalog?

Yes. CVE-2026-56155 is on the CISA Known Exploited Vulnerabilities list, added 2026-07-14.

What is the CVSS severity of CVE-2026-56155?

CVE-2026-56155 has a CVSS v3 base score of 7.8 (HIGH).

How do I fix or mitigate CVE-2026-56155?

No published fix for CVE-2026-56155 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2026-07-28. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2026-56155

HIGHCISA KEV

7.8

CVSS v3

NVD

Description

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

CWE-1220

How to fix

Actively exploited, no published fix found yet

Federal remediation due: 2026-07-28

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

EPSS data unavailable for this CVE.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-07-28

References

Other references2

Related Vulnerabilities

Other CWE-1220 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-31201	Critical	9.8	13%	KEV	Fix
CVE-2026-33825	High	7.8	6.7%	KEV + Ransom	Fix
CVE-2024-42365	High	7.4	4.7%	-	Fix
CVE-2026-39363	High	7.5	2.9%	-	Fix
CVE-2023-43040	Medium	6.5	2.5%	-	Fix
CVE-2023-33127	High	8.1	1.9%	-	Fix

Embed a live status badge for CVE-2026-56155

Markdown

[![CVE-2026-56155](https://tridentstack.com/cve/badge/CVE-2026-56155.svg)](https://tridentstack.com/cve/CVE-2026-56155)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-56155"><img src="https://tridentstack.com/cve/badge/CVE-2026-56155.svg" alt="CVE-2026-56155"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-14.