CVE-2026-54203 in TeamDavid
Summary
by MITRE • 08/07/2026
Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds with memory. By repeatedly requesting this endpoint, an attacker can access sensitive information, including user passwords. Exploitation does not require authentication. This issue affects TeamDavid through Rollout 524.
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical memory leak flaw in Tobit Laboratories AG TeamDavid's Webbox software that exposes sensitive data to unauthorized actors through improper resource handling. The issue manifests when accessing the specific URL path "/.well-known/mta-sts." which triggers an application response containing memory contents rather than the expected structured data. This memory leakage occurs due to inadequate input validation and resource management within the web server component, allowing attackers to extract sensitive information including user credentials through repeated requests to the vulnerable endpoint.
The technical implementation of this vulnerability stems from improper handling of HTTP requests to well-known endpoints, where the application fails to properly sanitize or validate incoming requests before processing them. According to CWE classification, this represents a memory leak vulnerability categorized under CWE-127 and potentially CWE-476, as the system exposes uninitialized memory contents through its response mechanism. The flaw enables information disclosure attacks by allowing attackers to harvest sensitive data from memory dumps that should remain protected within the application's secure boundaries.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates a persistent threat vector that does not require authentication for exploitation. Attackers can systematically access the memory contents through repeated requests to the "/.well-known/mta-sts." endpoint, gradually accumulating sensitive data including user passwords and potentially other system credentials. This unauthenticated access pattern aligns with ATT&CK technique T1213.002 for Data from Information Repositories, as it allows adversaries to harvest credentials directly from application memory without requiring additional compromise steps.
The vulnerability affects TeamDavid Webbox installations through Rollout 524, indicating that this is a regression or persistent flaw introduced in the software lifecycle that has not been properly addressed through standard security patches. This creates a significant risk for organizations using the affected software, as the memory leak provides attackers with direct access to authentication credentials and potentially other sensitive operational data. The impact is particularly severe because the attack surface is minimal and requires no specialized privileges beyond basic network connectivity.
Mitigation strategies should focus on implementing proper input validation and resource management within the web server component to prevent memory contents from being exposed through HTTP responses. Organizations should immediately apply available patches or updates from Tobit Laboratories AG to address this vulnerability, while also implementing network-level restrictions that limit access to well-known endpoints where possible. The solution must include proper memory deallocation procedures and ensure that all response data is properly sanitized before transmission to prevent information leakage. Additionally, monitoring systems should be configured to detect anomalous patterns of requests to sensitive endpoints that could indicate exploitation attempts, aligning with ATT&CK technique T1071.004 for Application Layer Protocol: DNS to identify potential abuse of the vulnerable functionality.