CVE-2026-57106 Microsoft Data Quality Elevation of Privilege Vulnerability

Microsoft has disclosed CVE-2026-57106, a high-severity server-side request forgery (SSRF) vulnerability affecting its Data Quality product. This flaw allows an unauthorized attacker to exploit a vulnerable component within Data Quality to force the server to make requests to internal or external resources on their behalf. If successfully exploited, the SSRF can be leveraged to gain access to sensitive internal network services or information, ultimately leading to elevation of privileges within the affected environment or the broader network. This could grant attackers higher access rights than they were initially authorized for, posing a significant risk to data integrity and system security. Organizations using Microsoft Data Quality should prioritize patching this vulnerability to prevent potential exploitation.

Attack Chain

1. An attacker identifies a server-side request forgery (SSRF) vulnerability within a component of Microsoft Data Quality.
2. The attacker crafts a malicious HTTP request containing a controlled URL or resource identifier intended for the vulnerable Data Quality endpoint.
3. The vulnerable Data Quality component, upon processing the crafted request, is tricked into making an unauthorized internal network request on behalf of the attacker.
4. This internal request targets sensitive services or endpoints within the organization's network, such as internal APIs, cloud instance metadata services, or intranet applications.
5. The attacker gains access to or exfiltrates sensitive information (e.g., API keys, service credentials, internal network topology) or interacts with internal services.
6. The obtained sensitive information or access is then leveraged by the attacker to escalate their privileges within the Data Quality environment or the broader internal network, gaining higher access rights than initially authorized.

Impact

Successful exploitation of CVE-2026-57106 by an unauthorized attacker would result in elevation of privilege within the affected Microsoft Data Quality environment and potentially the underlying network infrastructure. This could allow the attacker to gain control over sensitive data, access restricted internal services, or further compromise connected systems. The impact could range from unauthorized data disclosure and modification to full system compromise, depending on the internal resources accessible via the SSRF and the subsequent privileges gained. Given that it's an elevation of privilege, it can be a critical step for attackers to establish persistence or move laterally.

Recommendation

• Apply the security update for CVE-2026-57106 immediately, as provided by Microsoft in the associated MSRC advisory.
• Implement network segmentation to restrict internal service access and limit the blast radius of potential SSRF vulnerabilities.
• Monitor network logs for unusual outbound connections originating from Data Quality servers, especially to internal IP ranges or metadata service endpoints.