Attack Chain

1. Attacker identifies an instance of Sixun Shanghui Group Business Management System 10 exposed to the internet.
2. Attacker crafts a malicious HTTP request targeting the /api/Dinner/PayConfig endpoint.
3. The crafted request includes a modified tableno parameter containing SQL injection payloads.
4. The application fails to properly sanitize the tableno input before using it in an SQL query.
5. The injected SQL code is executed against the database, granting the attacker control over query execution.
6. Attacker extracts sensitive information from the database, such as user credentials, financial data, or customer details.
7. Alternatively, the attacker modifies database records to escalate privileges or disrupt application functionality.

Impact

Successful exploitation of this SQL injection vulnerability (CVE-2026-9544) can have severe consequences. An attacker could gain unauthorized access to sensitive business data, leading to financial loss, reputational damage, and legal liabilities. Modification or deletion of critical data could disrupt business operations and lead to system downtime. Given the lack of vendor response, organizations using the affected software are at significant risk.

Recommendation

• Apply input validation and sanitization to the tableno parameter in the /api/Dinner/PayConfig endpoint to prevent SQL injection attacks.
• Deploy the Sigma rule Detect CVE-2026-9544 Exploitation - Sixun Shanghui SQL Injection to identify attempts to exploit this vulnerability via web server logs.
• Implement a web application firewall (WAF) with rules to block common SQL injection payloads targeting the /api/Dinner/PayConfig endpoint.
• Regularly monitor web server logs for suspicious activity, including requests with unusual characters or SQL keywords in the tableno parameter.
• Apply the Sigma rule Detect Suspicious HTTP POST Request to Dinner PayConfig API to detect possible exploitation attempts.