Description
Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a network.
Published: 2026-05-22
Score: 10 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

An attacker can bypass authentication controls in Azure Resource Manager, allowing them to gain higher levels of permission than intended. This flaw permits the unauthorized escalation of privileges to administer resources and potentially deploy malicious services. The weakness is classified as CWE-287, indicating improper authentication.

Affected Systems

Microsoft Azure Resource Manager. No specific version information is provided by the citation; administrators should verify that their ARM instance is up to date.

Risk and Exploitability

The CVSS score of 10 underscores the high severity of this exploitation. Although an EPSS score is not listed and the vulnerability is not currently in the CISA KEV catalog, the nature of the flaw allows a remote attacker with network access to ARM APIs to potentially elevate privileges without credential validation. The impact scope can reach organization-wide resources if the attacker accesses high-privilege accounts. Immediate action is recommended to mitigate the risk.

Generated by OpenCVE AI on May 22, 2026 at 23:24 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Microsoft release that fixes the authentication flaw for Azure Resource Manager.
  • Restrict network access to ARM endpoints by configuring firewalls or virtual network rules so that only trusted IP ranges and secured services can reach the API.
  • Implement Azure AD Conditional Access policies that require multi‑factor authentication for role‑based management operations and monitor for anomalous activity in Azure Monitor or Security Center.

Generated by OpenCVE AI on May 22, 2026 at 23:24 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 22 May 2026 22:30:00 +0000

Type Values Removed Values Added
Description Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a network.
Title Azure Resource Manager Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft azure Resource Manager
Weaknesses CWE-287
CPEs cpe:2.3:a:microsoft:azure_resource_manager:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft azure Resource Manager
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Azure Resource Manager
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-05-22T22:03:07.357Z

Reserved: 2026-05-18T23:53:33.895Z

Link: CVE-2026-47280

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-22T23:30:03Z

Weaknesses