Vulnerability · Published Sep 3, 2026 · Assigned by microsoft

CVE-2026-83711Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability

Critical 10.0

In plain English

A critical-severity authorization bypass via user-controlled key in Entra from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.8%top 43.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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

Affected products (as reported)

Vendor	Product	Versions
Microsoft	Entra	-

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C

References

Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability vendor-advisory, patch