CVE-2026-54213 in TeamDavid
Summary
by MITRE • 08/07/2026
Tobit Laboratories AG TeamDavid's Webbox application exposes a functionality that allows the server to be shut down when a specific endpoint (/internalRestart) is accessed. This endpoint is accessible to unauthenticated users over the public Internet. Instead of “restarting”, the server shuts completely down. As a result, a remote attacker can trigger a persistent denial of service by shutting down the web server without requiring authentication. Recovery requires manual administrator intervention to restart the service. This issue affects TeamDavid through Rollout 524.
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Analysis
by VulDB Data Team • 08/07/2026
The vulnerability in question represents a critical security flaw within TeamDavid's Webbox application that exposes a remote denial of service attack vector through an improperly secured internal endpoint. This weakness allows unauthenticated remote attackers to execute a complete server shutdown by accessing the /internalRestart endpoint, which should have been restricted to authorized administrative users only. The exposed functionality directly violates fundamental security principles of least privilege and proper access control implementation, creating a persistent threat that can be exploited repeatedly without authentication requirements.
This technical flaw stems from inadequate input validation and access control mechanisms within the Webbox application's architecture. The /internalRestart endpoint serves as an administrative function that should require proper authentication and authorization before execution, yet it remains accessible to any user connecting to the public internet. The vulnerability manifests as a direct command injection pattern where external requests can trigger system-level shutdown operations instead of intended restart functions, representing a clear deviation from expected application behavior. This type of flaw is categorized under CWE-284 Access Control Issues and aligns with ATT&CK technique T1499.004 for Network Denial of Service attacks.
The operational impact of this vulnerability extends beyond simple service disruption to create persistent availability issues that require manual intervention for resolution. When exploited, the vulnerability enables attackers to completely power down web servers without authentication, forcing administrators to perform manual restart procedures that can take significant time to complete. This creates extended downtime periods that can severely impact business operations and user access to services, particularly in environments where automated recovery mechanisms are not implemented. The persistent nature of this attack vector means that each successful exploitation requires separate manual intervention, making it a particularly damaging threat that can be repeatedly leveraged without additional authentication requirements.
Mitigation strategies should focus on immediate access control enforcement for the /internalRestart endpoint through robust authentication mechanisms and proper network segmentation. Administrators must implement strict firewall rules to restrict access to internal administrative endpoints from public internet interfaces, ensuring that only authorized networks or IP addresses can reach these functions. The application code requires immediate patching to enforce proper authentication checks before allowing execution of shutdown operations, with additional logging implemented to monitor unauthorized access attempts. Security configurations should be reviewed to ensure that administrative functions are not exposed to untrusted networks and that appropriate network segmentation is in place to isolate critical system management interfaces from public internet exposure. Implementation of rate limiting and monitoring for unusual access patterns can also help detect potential exploitation attempts and provide early warning capabilities for administrators.