What is CVE-2026-69399?

CVE-2026-69399 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 10.0/10. Published 2026-09-17.

How severe is CVE-2026-69399?

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

Vulnerability in Microsoft Azure Arc

CVE-2026-69399

Azure Arc Elevation of Privilege Vulnerability

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:H.

Affected products

Microsoft Azure Arc

Weakness classification (CWE)

CWE-441 — Unintended Proxy or Intermediary (Confused Deputy)

References

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

Frequently asked questions

What is CVE-2026-69399?: CVE-2026-69399 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 10.0/10. Published 2026-09-17.
How severe is CVE-2026-69399?: Critical severity. CVSS v3 base score is 10.0 out of 10.