Introduction
Unauthorized privilege escalation in customer service systems can lead to exposure of sensitive communications, unauthorized access to business workflows, and potential regulatory violations. The improper authorization flaw tracked as CVE-2025-64655 in Microsoft Dynamics OmniChannel SDK Storage Containers is a high-severity issue that allows attackers to bypass access controls and escalate privileges over the network.
Microsoft Dynamics 365 is a widely adopted suite of enterprise CRM and ERP applications, with OmniChannel capabilities enabling organizations to manage customer interactions across chat, voice, and digital channels. The OmniChannel SDK Storage Containers are core components for storing and retrieving customer service data in these environments.
Technical Information
CVE-2025-64655 is a result of improper authorization checks within the Dynamics OmniChannel SDK Storage Containers. The vulnerability is classified under CWE-285, which covers cases where a product fails to correctly enforce authorization before granting access to resources or operations.
The root cause is insufficient validation of user permissions in the storage container logic. This allows an attacker to send crafted network requests to the vulnerable endpoints and gain elevated privileges without prior authentication. The flaw affects the authorization logic responsible for determining whether a user or service principal has the necessary rights to perform actions on storage resources. As a result, unauthorized actors may be able to access, modify, or delete sensitive customer service data and system configurations.
No public code snippets or detailed exploit chains are available for this vulnerability as of the publication date. The attack vector is network-based, and exploitation does not require local access or prior authentication.
Affected Systems and Versions
- Microsoft Dynamics OmniChannel SDK Storage Containers
- Affects all versions prior to 1.11.0 (support for versions before 1.11.0 ended November 1, 2025)
- Both cloud-hosted (Dynamics 365 Online) and on-premises deployments are potentially vulnerable
- Custom integrations and third-party extensions using the OmniChannel SDK should be reviewed for exposure
Vendor Security History
Microsoft has a history of addressing improper authorization vulnerabilities in its enterprise and cloud products. Notable examples include:
- CVE-2025-26683 (Azure Playwright improper authorization)
- CVE-2025-62206 (Dynamics 365 on-premises information disclosure)
Microsoft typically releases security patches as part of its monthly Patch Tuesday cycle and provides detailed advisories through the Microsoft Security Response Center (MSRC). The company maintains a public vulnerability disclosure program and has demonstrated timely response to critical security issues in its cloud and enterprise platforms.
