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Microsoft Security Response CenterCVE-2026-83711

Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability

CriticalVendor CVSS 10.0 / 10 1 CVE Published Sep 8, 2026 at 7:00 AM UTC

Summary

Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.

Products covered

  • Microsoft Azure Active Directory B2C

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory's last-updated date.

Updates

  1. Added to SecurityAlert

    We collected the advisory from the official source.

  2. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.