What is CVE-2026-62916?

CVE-2026-62916 is a critical-severity vulnerability in Microsoft Entra Id, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-09-03.

How severe is CVE-2026-62916?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Microsoft Entra Id

CVE-2026-62916

Authentication bypass using an alternate path or channel in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.

Published 2026-09-03 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.9th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.003

Affected products

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

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

Frequently asked questions

What is CVE-2026-62916?: CVE-2026-62916 is a critical-severity vulnerability in Microsoft Entra Id, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-09-03.
How severe is CVE-2026-62916?: Critical severity. CVSS v3 base score is 9.1 out of 10.