What is CVE-2026-83941?

CVE-2026-83941 is a critical-severity vulnerability in Microsoft Entra Id, classified under Missing Authorization. CVSS score: 9.9/10. Published 2026-09-08.

How severe is CVE-2026-83941?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Auth bypass in Microsoft Entra Id

CVE-2026-83941

Missing authorization in Entra ID allows an authorized attacker to elevate privileges over a network.

Vulnerability class: Broken Access Control

Published 2026-09-08 · last modified 2026-09-16.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.008 (55.4th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Entra ID Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-83941?: CVE-2026-83941 is a critical-severity vulnerability in Microsoft Entra Id, classified under Missing Authorization. CVSS score: 9.9/10. Published 2026-09-08.
How severe is CVE-2026-83941?: Critical severity. CVSS v3 base score is 9.9 out of 10.