CVE-2026-2944 in Online Store Management System ネット店舗管理システム
Summary
by MITRE • 02/22/2026
A security flaw has been discovered in Tosei Online Store Management System ネット店舗管理システム 1.01. Affected is the function system of the file /cgi-bin/monitor.php of the component HTTP POST Request Handler. Performing a manipulation of the argument DevId results in os command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/27/2026
The vulnerability identified as CVE-2026-2944 represents a critical command injection flaw within the Tosei Online Store Management System version 1.01, specifically affecting the HTTP POST Request Handler component. This security weakness resides in the /cgi-bin/monitor.php file where the DevId parameter is processed without adequate input validation or sanitization, creating a pathway for malicious actors to execute arbitrary operating system commands on the affected server. The flaw stems from improper handling of user-supplied data in a web application context, allowing attackers to manipulate the DevId argument to inject and execute OS commands directly on the target system.
The technical implementation of this vulnerability aligns with CWE-77 and CWE-94, which categorize it as a command injection vulnerability that can lead to arbitrary code execution. The attack vector is remotely exploitable through HTTP POST requests, making it particularly dangerous as it does not require physical access or local system privileges. When an attacker submits a malicious DevId parameter containing shell commands, the application fails to properly sanitize this input before processing, resulting in the execution of unintended system commands with the privileges of the web application user. This presents a severe risk to the confidentiality, integrity, and availability of the affected system and its underlying data.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to gain full control over the affected server. Successful exploitation could allow adversaries to install backdoors, exfiltrate sensitive customer data, modify transaction records, or disrupt business operations through denial of service attacks. The fact that the exploit has been publicly released and is actively being used for attacks significantly increases the risk profile, as it reduces the barrier to exploitation and eliminates the need for advanced technical skills. Organizations using this system face potential financial losses, regulatory compliance violations, and reputational damage from data breaches or service disruptions.
Mitigation strategies should focus on immediate remediation through input validation and output encoding to prevent command injection attacks. The most effective immediate fix involves implementing strict parameter validation for the DevId input, rejecting any input containing dangerous characters or sequences that could be used for command injection. Additionally, the system should be updated to use secure coding practices that prevent the direct execution of user-supplied input as system commands. Organizations should also implement network-level protections such as web application firewalls and intrusion detection systems to monitor for exploitation attempts. The lack of vendor response to early disclosure attempts underscores the importance of proactive security measures and the need for organizations to maintain their own security monitoring capabilities. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other system components, while proper incident response procedures should be established to quickly address any exploitation attempts that may occur.