CVE-2026-54210 in TeamDavid
Summary
by MITRE • 08/07/2026
Tobit Laboratories AG TeamDavid's Webbox application implements various file upload functionalities that are vulnerable to a buffer overflow condition. By specifying an excessively long filename in a file upload request, an unauthenticated attacker can trigger a crash of the server, resulting in a denial of service. Depending on the stack state or if a stack canary can be disclosed through another vulnerability, this buffer overflow could potentially be exploited for remote code execution, leading to full compromise of the server. This issue affects TeamDavid through Rollout 524.
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Analysis
by VulDB Data Team • 08/07/2026
The vulnerability identified in Tobit Laboratories AG TeamDavid's Webbox application represents a critical buffer overflow condition within the file upload functionality that exposes the system to both denial of service and potential remote code execution threats. This flaw exists in the application's handling of user-supplied filenames during file upload operations, where insufficient input validation allows malicious actors to craft overly long filename strings that exceed the allocated buffer space. The vulnerability specifically affects TeamDavid through Rollout 524, indicating a regression or persistent flaw across multiple versions of the software stack.
The technical implementation of this vulnerability stems from inadequate bounds checking within the file upload processing code where the application fails to properly validate the length of filenames before copying them into fixed-size buffers. This classic buffer overflow condition occurs when user-provided input exceeds the allocated memory space, causing adjacent memory locations to be overwritten and potentially corrupting critical program execution structures. The flaw aligns with CWE-121, which describes stack-based buffer overflow conditions, and may also relate to CWE-122 for heap-based buffer overflows depending on implementation details. When an attacker submits a maliciously crafted filename that exceeds the buffer capacity, the application crashes due to memory corruption, resulting in immediate denial of service.
The operational impact of this vulnerability extends beyond simple service disruption as it creates potential pathways for more severe compromise scenarios. While the primary effect manifests as server crash and denial of service, the presence of stack-based buffer overflows in modern systems with stack canaries presents additional risks. If an attacker can successfully disclose stack canary values through auxiliary vulnerabilities or by exploiting other memory corruption issues, they may be able to craft payloads that bypass stack protection mechanisms. This scenario would transform the vulnerability from a simple denial of service into a potential remote code execution vector, allowing full compromise of the affected server and potentially enabling lateral movement within the network infrastructure.
Mitigation strategies for this vulnerability must address both immediate protection and long-term remediation requirements. The most effective immediate solution involves implementing strict input validation controls that limit filename length to reasonable parameters before any processing occurs, thereby preventing buffer overflow conditions from manifesting. Additionally, developers should implement proper bounds checking mechanisms and utilize secure coding practices such as those recommended in the OWASP Secure Coding Practices guidelines. For defense in depth, network-level controls including web application firewalls and intrusion detection systems can help identify and block suspicious file upload attempts. The vulnerability also aligns with ATT&CK technique T1203, which covers exploitation of known vulnerabilities for privilege escalation or system compromise, making it essential to implement comprehensive vulnerability management processes that include regular security assessments and patch deployment protocols.
The broader implications of this vulnerability highlight the critical importance of input validation in web applications and demonstrate how seemingly minor implementation flaws can create significant security risks. Organizations utilizing TeamDavid Webbox software should prioritize immediate patching and remediation efforts while establishing monitoring procedures to detect potential exploitation attempts. Security teams must also consider implementing application-level protections such as address space layout randomization and stack canary implementations to mitigate the risk of successful exploitation, particularly given the potential for remote code execution when stack protection mechanisms are bypassed or absent.