Description

'.../...//' in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.9",
  "pubDate": "2026-08-07T00:16:33.780Z",
  "pubdate": "2026-08-07T00:16:33.780Z",
  "executiveSummary": "A privilege escalation vulnerability has been identified within the Microsoft Entra Provisioning Service (SyncFabric). This security flaw allows an authenticated adversary to elevate their operational privileges across a network infrastructure.\nThe vulnerability targets the synchronization and provisioning fabric, potentially allowing unauthorized capability expansion that compromises the confidentiality, integrity, and availability of managed directory services.\nExploitation requires the attacker to possess prior authorization within the environment, indicating an insider threat or compromised low-privilege credential scenario. The attack is network-vectorized and targets core architectural components of the provisioning service.\nThe inherent risk involves unauthorized administrative access acquisition, leading to potential domain-wide persistence, unauthorized identity manipulation, and unauthorized resource provisioning within the enterprise identity ecosystem.\nDefensive strategies must focus on strict access control enforcement, monitoring of directory synchronization anomalies, and applying official vendor updates as they become available to remediate path traversal or input validation weaknesses implied by the vector.",
  "technicalDetails": "The vulnerability resides within the Microsoft Entra Provisioning Service, specifically within the SyncFabric component responsible for identity synchronization and lifecycle management.\nThe presence of path traversal or relative path manipulation sequences, specifically represented by the input pattern '.../...//', suggests a failure in rigorous input validation, canonicalization, or path sanitization within the affected component's request handling or file/resource resolution mechanisms.\nAn authenticated attacker initiates the attack vector over the network by injecting specially crafted traversal sequences into parameters processed by the SyncFabric. Because the service improperly validates these inputs, the traversal sequences bypass boundary checks, allowing unauthorized access to restricted directories, internal APIs, or administrative contexts.\nThe step-wise attack flow begins with the attacker authenticating to the network with low-privileged credentials. The attacker crafts an input payload containing the '.../...//' sequence directed at vulnerable endpoints within the SyncFabric. Upon processing the request, the internal validation mechanism fails to neutralize the traversal symbols, causing the application to misinterpret the execution context or resource location.\nThis processing anomaly grants the attacker elevated privileges, effectively bridging the security boundary between standard user capabilities and administrative control within the provisioning domain.\nPost-exploitation impact includes unauthorized modification of user identities, escalation to high-privileged roles, execution of arbitrary administrative provisioning tasks, and potential lateral movement across integrated cloud and on-premises directory structures."
}