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CVE-2026-57100: Microsoft Entra Provisioning Service Elevation of Privilege Vulnerability

criticalCVSS 9.9CVE-2026-57100
Server-side request forgery (ssrf) in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.

CSIRTS triage

vendor: Microsoftproduct: Microsoft Entra Provisioning ServiceServer-side request forgeryPrivilege escalation
What
This vulnerability allows an authorized attacker to elevate privileges via server-side request forgery (SSRF).
Who is affected
Users of Microsoft Entra Provisioning Service are affected.
Urgency
This is a critical vulnerability with a CVSS score of 9.9, requiring immediate remediation.
Action
Apply the latest security updates to mitigate this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.9
Published
2026-07-02
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57100

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-57100coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Microsoft Entra Provisioning

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center