What is CVE-2026-21224?

CVE-2026-21224 is a high-severity vulnerability in Microsoft Azure Connected Machine Agent, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-01-13.

How severe is CVE-2026-21224?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Microsoft Azure Connected Machine Agent

CVE-2026-21224

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

Vulnerability class: Buffer Overflow

EPSS: 0.001 (28.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Azure Connected Machine Agent — versions 1.0.0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

Azure Connected Machine Agent Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-21224?: CVE-2026-21224 is a high-severity vulnerability in Microsoft Azure Connected Machine Agent, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-01-13.
How severe is CVE-2026-21224?: High severity. CVSS v3 base score is 7.8 out of 10.