CVE-2026-57475 in AI Assist for Customer
Summary
by MITRE • 07/10/2026
Deloitte AI Assist for Customer accepted unauthenticated POST requests through public-facing API endpoints that allowed a remote attacker to make limited additions to the configuration. These additions were not used by the system. On 2026-03-25, AI Assist for Customer restricted network access and enforced authentication for the previously exposed endpoints.
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Analysis
by VulDB Data Team • 07/10/2026
The vulnerability in Deloitte AI Assist for Customer represents a critical authorization flaw that allowed unauthenticated remote attackers to submit POST requests to public-facing API endpoints. This issue falls under the category of insufficient authentication controls as defined by CWE-287, where the system failed to properly verify the identity of requestors before processing their submissions. The affected endpoints were accessible without requiring any form of authentication credentials, creating an attack surface that could be exploited by malicious actors to manipulate system configuration parameters.
The technical implementation flaw involved the absence of proper access control mechanisms at the API gateway level, allowing any remote user to send POST requests containing configuration data to the vulnerable endpoints. While the system was designed to reject these additions as they were not utilized by the operational system, the mere existence of this capability created a potential vector for privilege escalation attacks or configuration manipulation that could have been leveraged in conjunction with other vulnerabilities. The vulnerability aligns with ATT&CK technique T1078 004 which focuses on valid accounts and credential manipulation, though in this case it involved bypassing authentication entirely rather than using legitimate credentials.
The operational impact of this vulnerability was significant despite the limited nature of the configuration additions that could be made. Attackers could potentially inject malicious configuration parameters that might affect system behavior or create backdoor access points for future exploitation. The exposure created an opportunity for attackers to establish persistent access patterns or manipulate system settings in ways that could compromise data integrity and availability. Even though the added configurations were not actively used by the system, the potential for abuse remained high due to the lack of authentication requirements.
The remediation implemented by Deloitte on 2026-03-25 addressed the core issue through network access restrictions and mandatory authentication enforcement for the previously exposed endpoints. This solution aligns with security best practices outlined in the OWASP API Security Top 10, specifically addressing the lack of authentication and authorization controls. The restriction of network access likely involved implementing firewall rules or network segmentation to limit exposure to trusted networks only, while mandatory authentication enforcement required proper API key validation or session management mechanisms. These mitigations effectively closed the attack vector by ensuring that all requests to the configuration endpoints must be authenticated before processing any data submissions.
The vulnerability demonstrates the importance of implementing defense-in-depth strategies where multiple layers of security controls work together to prevent unauthorized access. It also highlights how seemingly minor authorization gaps can create significant security risks when combined with other potential attack vectors. Organizations should consider implementing comprehensive API security monitoring and logging to detect unusual patterns in API usage that might indicate exploitation attempts against similar vulnerabilities in their systems. The incident serves as a reminder of the critical need for regular security assessments of public-facing APIs to identify and remediate authentication weaknesses before they can be exploited by malicious actors.