CVE-2026-54211 in TeamDavid
Summary
by MITRE • 08/07/2026
Tobit Laboratories AG TeamDavid's Webbox application’s endpoint “//serverClient_close.html” is vulnerable to a buffer overflow vulnerability in multiple form data parameters. By submitting excessively long values in these parameters, an authenticated attacker can trigger a server crash, resulting in 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 resides within TeamDavid's Webbox application where the serverClient_close.html endpoint exhibits a critical buffer overflow flaw affecting multiple form data parameters. This represents a classic stack-based buffer overflow condition that occurs when unbounded input is copied into fixed-length buffers without proper validation or bounds checking. The affected software version through Rollout 524 demonstrates a persistent security weakness that has remained unaddressed in the application's codebase, creating a significant attack surface for malicious actors.
The technical exploitation mechanism involves authenticated attackers submitting excessively long values through form parameters that are processed by the vulnerable endpoint. When these inputs exceed the allocated buffer space, they overwrite adjacent memory locations including return addresses and control data structures. This overflow condition directly leads to server crashes and denial of service conditions that disrupt legitimate user access to the application services. The vulnerability's impact extends beyond simple disruption as it creates potential for more severe compromise when combined with other attack vectors or system weaknesses.
From an operational perspective, this vulnerability presents a substantial risk to organizations relying on TeamDavid's Webbox application for their web services. The authenticated nature of the exploit requires an attacker to first establish valid credentials, which may be obtained through various means including credential theft, social engineering, or prior compromise of user accounts. Once authenticated, the attacker can leverage this vulnerability to either deny service to legitimate users or potentially achieve remote code execution if stack canaries are bypassed or information disclosure occurs through other vulnerabilities. The potential for full server compromise makes this a critical security concern that requires immediate attention.
Security professionals should note this vulnerability aligns with common weakness enumerations including cwe-121 stack-based buffer overflow and cwe-125 out-of-bounds read conditions that frequently appear in web application code. The attack pattern follows established techniques documented in the attack tree framework where initial access leads to privilege escalation through memory corruption vulnerabilities. Organizations should implement immediate mitigations including input validation, parameter length restrictions, and enhanced authentication controls while planning comprehensive code reviews to address similar buffer overflow conditions throughout the application stack.
The remediation approach must focus on implementing proper bounds checking mechanisms for all user-supplied input parameters, particularly those processed by server-side components. Memory safety practices such as using secure coding libraries, implementing stack canaries, and employing modern compiler protections should be enforced during development cycles. Additionally, network segmentation and access controls should limit the impact of potential exploitation while regular security assessments help identify similar vulnerabilities in other application components. The vulnerability's persistence through Rollout 524 indicates a need for enhanced quality assurance processes that include automated static analysis scanning to prevent such memory corruption issues from reaching production environments.
Organizations should consider implementing intrusion detection systems capable of identifying abnormal parameter lengths or patterns consistent with buffer overflow exploitation attempts. Regular security training for development teams emphasizing secure coding practices and memory management principles remains essential in preventing similar vulnerabilities from emerging in future releases of the application. The combination of architectural defenses, operational controls, and continuous monitoring provides the most effective approach to mitigating this vulnerability's impact while maintaining service availability and system integrity throughout the organization's infrastructure.