CVE-2026-1192 identifies a command injection vulnerability in the Tosei Online Store Management System ネット店舗管理システム version 1.01. The vulnerability exists in an unspecified function within the /cgi-bin/imode_alldata.php script, where manipulation of the DevId argument allows an attacker to inject and execute arbitrary system commands remotely. This attack vector requires no authentication or user interaction, making it accessible to unauthenticated remote attackers. The vulnerability affects the confidentiality, integrity, and availability of the affected system, as arbitrary command execution can lead to data leakage, unauthorized modifications, or service disruption. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) reflects a medium severity rating of 6.9, indicating partial impacts on confidentiality, integrity, and availability with low attack complexity and no privileges required. The vendor was contacted early but did not respond or provide a patch, and no official remediation is currently available. Although no known exploits in the wild have been reported, the public disclosure of the vulnerability increases the risk of exploitation. The affected product is a niche online store management system, likely used in specific markets, including Japan and possibly some European organizations with Japanese software dependencies or international e-commerce operations. The vulnerability’s exploitation could allow attackers to compromise backend systems, steal sensitive customer or business data, or disrupt online store operations.

For European organizations using the Tosei Online Store Management System 1.01, this vulnerability poses a significant risk of unauthorized remote code execution, which can lead to data breaches, manipulation of business-critical data, and service outages. The partial compromise of confidentiality may expose customer information or proprietary business data. Integrity impacts could allow attackers to alter product listings, pricing, or transaction records, undermining business trust and compliance with data protection regulations such as GDPR. Availability impacts could disrupt online store operations, causing financial losses and reputational damage. Since the vulnerability requires no authentication or user interaction, it can be exploited by automated attacks, increasing the risk of widespread compromise. European e-commerce entities relying on this system or integrating it into their infrastructure may face operational disruptions and regulatory consequences if exploited. The lack of vendor response and patch availability exacerbates the risk, necessitating immediate defensive measures.

1. Implement strict network-level access controls to restrict access to the /cgi-bin/imode_alldata.php endpoint, limiting it to trusted IP addresses or internal networks only. 2. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block suspicious payloads targeting the DevId parameter, focusing on command injection patterns. 3. Conduct input validation and sanitization on all parameters, especially DevId, to reject or neutralize potentially malicious input before processing. 4. Monitor system and web server logs for unusual command execution attempts or anomalies related to the vulnerable script. 5. Isolate the affected system in a segmented network zone to minimize lateral movement if compromised. 6. Consider deploying runtime application self-protection (RASP) solutions to detect and prevent command injection at runtime. 7. Engage in active threat hunting and incident response preparedness to quickly identify and contain exploitation attempts. 8. Explore alternative or updated e-commerce management solutions if patching or vendor support remains unavailable. 9. Regularly update and patch all other components of the infrastructure to reduce overall attack surface.