CVE-2026-17569 in Server
Summary
by MITRE • 07/27/2026
Improper access control in the NetBox synchronizer in Devolutions Server allows an authenticated user with view-only permission on an entry to obtain a stored API token via the partial connection endpoint.
This issue affects :
* Devolutions Server 2026.2.4.0 through 2026.2.12.0 * Devolutions Server 2026.1.23.0 and earlier
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Analysis
by VulDB Data Team • 07/27/2026
The vulnerability described represents a critical access control flaw within Devolutions Server's NetBox synchronizer component that undermines the principle of least privilege and enables unauthorized information disclosure. This weakness specifically targets the partial connection endpoint which is designed to provide limited functionality while maintaining security boundaries. The flaw allows authenticated users who possess only view-only permissions on specific entries to escalate their privileges and extract stored API tokens from the system's configuration management layer.
The technical implementation of this vulnerability stems from inadequate authorization checks within the NetBox synchronizer module. When an authenticated user attempts to access a partial connection endpoint, the system fails to properly validate whether the requesting user has sufficient privileges to access the underlying API token information. This misconfiguration creates a path where users with minimal permissions can bypass normal access controls and retrieve sensitive authentication credentials that should remain protected within the system's secure configuration store.
The operational impact of this vulnerability extends beyond simple information disclosure, as stolen API tokens could enable attackers to perform unauthorized operations across integrated systems. The affected versions span multiple release cycles including 2026.2.4.0 through 2026.2.12.0 and earlier 2026.1.23.0 releases, indicating this represents a widespread issue affecting the entire Devolutions Server product line during these specific timeframes. The vulnerability directly violates security standards such as CWE-285 which addresses improper authorization in software applications, and aligns with ATT&CK technique T1566 related to credential access through exploitation of application vulnerabilities.
Organizations running affected Devolutions Server versions face significant risk of privilege escalation attacks where attackers can leverage this flaw to obtain elevated system access. The vulnerability creates a pathway for lateral movement within networks where API tokens are used for system integration and automated operations. Given that API tokens often provide broad access capabilities to integrated services, successful exploitation could enable attackers to compromise entire infrastructure ecosystems rather than isolated systems.
Mitigation strategies should include immediate patching of affected Devolutions Server installations to the latest available versions that address this authorization flaw. System administrators must also implement additional monitoring controls around the NetBox synchronizer endpoints to detect anomalous access patterns and unauthorized token retrieval attempts. Network segmentation and least privilege enforcement should be reinforced to limit the potential damage from successful exploitation, while regular security audits should verify proper implementation of access controls throughout the system architecture. The vulnerability demonstrates the critical importance of comprehensive authorization testing and validation in complex enterprise systems where multiple authentication layers interact with sensitive configuration data stores.