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Vulnerability record · CVE-2026-21224 · published 13 January 2026

CVE-2026-21224: Microsoft azure connected machine agent stack-based buffer overflow vulnerability

Microsoft · Azure Connected Machine Agent

Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.

7.8 CVSS 3.1 High EPSS 0.32% · top 78.1% CWE-121 · Stack-based buffer overflow
7.8CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21224 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-47632Microsoft azure connected machine agent improper certificate validation vulnerabilityImproper certificate validation in Azure Connected Machine Agent allows an unauthorized attacker to elevate privileges over an adjacent network.EPSS 0.50%7.8CVE-2026-40381Microsoft azure connected machine agent improper access control vulnerabilityImproper access control in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.EPSS 0.30%7.8CVE-2025-58724Microsoft azure connected machine agent improper access control vulnerabilityImproper access control in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.EPSS 0.57%7.8CVE-2025-55316Microsoft azure connected machine agent vulnerabilityExternal control of file name or path in Azure Arc allows an authorized attacker to elevate privileges locally.EPSS 0.36%7.8CVE-2025-49692Microsoft azure connected machine agent improper access control vulnerabilityImproper access control in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.EPSS 0.34%7.8CVE-2024-38162Microsoft azure connected machine agent improper access control vulnerabilityAzure Connected Machine Agent Elevation of Privilege VulnerabilityEPSS 0.51%7.8CVE-2024-38098Microsoft azure connected machine agent link following vulnerabilityAzure Connected Machine Agent Elevation of Privilege VulnerabilityEPSS 0.63%7.3CVE-2024-21329Microsoft azure connected machine agent link following vulnerabilityAzure Connected Machine Agent Elevation of Privilege VulnerabilityEPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2026-21224), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.