What is CVE-2026-109469?

CVE-2026-109469 is a critical-severity vulnerability in Microsoft Entra Device Registration, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 10.0/10. Published 2026-11-06.

How severe is CVE-2026-109469?

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

Auth bypass in Microsoft Entra Device Registration

CVE-2026-109469

Authorization bypass through user-controlled key in Entra Device Registration allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-11-06 · last modified 2026-11-06.

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.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Entra Device Registration

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Entra Device Registration Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-109469?: CVE-2026-109469 is a critical-severity vulnerability in Microsoft Entra Device Registration, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 10.0/10. Published 2026-11-06.
How severe is CVE-2026-109469?: Critical severity. CVSS v3 base score is 10.0 out of 10.