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CVE-2026-57100 is a server-side request forgery vulnerability in Microsoft Entra Provisioning Service, also identified as SyncFabric. The flaw allows an authorized attacker to induce the service to make unintended network requests, resulting in elevation of privilege. Available reporting identifies the issue as network-accessible with low attack complexity and no user interaction, and classifies it as a critical elevation of privilege vulnerability affecting the Microsoft Entra provisioning component.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An elevation of privilege vulnerability in Microsoft Entra Provisioning Service with a CVSS score of 9.9 that could allow an attacker to gain privileges.
An elevation of privilege vulnerability in Microsoft Entra Provisioning Service, rated critical with a CVSS 3.1 score of 9.9.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.