CVE-2026-62916 is a critical (CVSS 9.1) authentication bypass using an alternate path or channel in Microsoft Entra ID, letting an unauthorized attacker elevate privileges over a network. The record names no version. Read the Microsoft entry for customer action and review sign-in and role changes.
What's affected
- Product: Microsoft Entra ID.
- Description in the record: authentication bypass using an alternate path or channel allows an unauthorized attacker to elevate privileges over a network.
- Fixed version: the record gives no version, since this is a cloud service. Microsoft's entry is the place to confirm whether you need to do anything.
- Weakness: CWE-288, authentication bypass using an alternate path or channel. CVSS 9.1, vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
How to check if you're exposed
Cloud service flaws like this are normally remediated by the provider, and the record names no customer action. I could not load Microsoft's entry, so confirm there whether anything is required of you. Whatever the answer, these checks are worth running.
What to do now
- Open the Microsoft entry and note any required customer action.
- Review sign in logs for unusual activity, including sign ins that skipped expected controls.
- Audit privileged role assignments and recent changes to them.
- Check conditional access policies cover all apps and legacy protocols, and require multifactor authentication for administrators.
- Alert on new privileged role assignments and new app registrations or consents.
Why it matters
An identity service is the front door for everything else. This weakness class means a sign in can be completed through a path that does not apply the normal checks. The record rates confidentiality and integrity impact high, with no login or user action needed.
The class is CWE-288. The provider operates the service, so the record has no version. What you can do is watch the identity logs closely and keep privileged roles small. The record's KEV flag is false.
Quick check
Is there a patch to install?
The record names no version, because Entra ID is a cloud service. Check Microsoft's entry.
What is the most useful log to watch?
Sign in logs and directory audit logs, especially role assignments.
Sources
- Microsoft Security Response Center entry (listed in the record, but it did not load when I reviewed it)
Last reviewed: 19 October 2026.
