Affects Microsoft Azure Active Directory B2C — a widely used cloud identity service. Remote auth bypass and privilege escalation in core identity infrastructure is highly impactful across enterprises.
CVE-2026-83711
Auth bypass in Azure AD B2C enabling remote privilege escalation and account takeover.
Is CVE-2026-83711 being exploited?
Not confirmed. CVE-2026-83711 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.58% probability of exploitation in the next 30 days.
How severe is CVE-2026-83711?
CVE-2026-83711 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-83711?
Yes. A fix has been recorded for CVE-2026-83711. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-83711 affect?
CVE-2026-83711 affects Microsoft Azure Active Directory B2C. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83711?
Apply Microsoft security update immediately; revoke/rotate affected keys; audit auth logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authorization bypass via user-controlled key in Azure AD B2C allowing remote privilege escalation and potential account takeover.
Immediate action required