# CVE-2026-57100 — Microsoft Entra Provisioning Service

> As of 2026-07-02, CVE-2026-57100 is a CRITICAL-severity vulnerability in Microsoft Entra Provisioning Service, CVSS v3.1 9.9. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-57100 as of 2026-07-02; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-02

## What is CVE-2026-57100?

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

The record classifies CVE-2026-57100 under weakness class [CWE-918](https://intel.threadlinqs.com/cwe/CWE-918). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 95 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.9 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-02

## Is CVE-2026-57100 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Microsoft](https://intel.threadlinqs.com/vendors/microsoft): Entra Provisioning Service

## How to fix CVE-2026-57100

No vendor patch reference has been recorded for CVE-2026-57100 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-57100

No threat campaign in the Threadlinqs corpus currently references CVE-2026-57100, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD. Last verified by Threadlinqs on 2026-07-04. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [msrc.microsoft.com — vendor advisory](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57100)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-57100
Full detection coverage and IOCs for threats exploiting CVE-2026-57100 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp