Affects Microsoft Entra Provisioning Service (SyncFabric); widely-used identity infra; critical privilege escalation potential.
CVE-2026-57100
SSRF in Microsoft Entra Provisioning Service enables privilege escalation.
Is CVE-2026-57100 being exploited?
Not confirmed. CVE-2026-57100 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 0.78% probability of exploitation in the next 30 days.
How severe is CVE-2026-57100?
CVE-2026-57100 is rated Critical with a CVSS score of 9.9. 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-2026-57100?
Yes. A fix has been recorded for CVE-2026-57100. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-57100 affect?
CVE-2026-57100 affects Microsoft Entra Provisioning Service (SyncFabric). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-57100?
Restrict access, monitor provisioning activity, review logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can exploit SSRF to escalate privileges across the tenant, risking full provisioning control.
Immediate action required