CVE-2026-40381 Details
Description
Improper access control in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.
A vulnerability allowing improper access control has been identified in Azure Connected Machine Agent. This issue enables an authorized attacker to locally elevate privileges. The vulnerability arises from inadequate access control, allowing attackers with existing access to interfere with local service ports used by ArcProxy. By sending specially crafted authentication data, they can manipulate the service into accessing and returning files typically restricted to higher-privileged system accounts, potentially exposing sensitive information.
Users are advised to update to version 1.63 of the Azure Connected Machine Agent. The security update is available for download via the Microsoft Update Catalog for Windows users and through the Azure CLI for Linux users.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40381 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft azure connected machine agent | < 1.63 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | Initial Analysis | [email protected] |
| May 12, 2026 | New CVE Received | [email protected] |