What is CVE-2026-69555?

CVE-2026-69555 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Incorrect Authorization. CVSS score: 10.0/10. Published 2026-08-20.

How severe is CVE-2026-69555?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Microsoft Azure Arc

CVE-2026-69555

Incorrect authorization in Azure Arc allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

Affected products

Microsoft Azure Arc

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-69555?: CVE-2026-69555 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Incorrect Authorization. CVSS score: 10.0/10. Published 2026-08-20.
How severe is CVE-2026-69555?: Critical severity. CVSS v3 base score is 10.0 out of 10.