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: Microsoft product: Microsoft Entra Provisioning Service Server-side request forgery Privilege 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.

⚡ Watch Microsoft Entra Provisioning Service

Get an email when a new Microsoft Entra Provisioning Service advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.9
Published: 2026-07-14
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.

Low exploitation riskCVE-2026-571000.65% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57100	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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