CVE-2025-52694: Advantech IoT Edge Linux Docker SQLi Flaw

CVE-2025-52694 Overview

CVE-2025-52694 is a critical SQL injection vulnerability affecting multiple Advantech IoT Suite products. Successful exploitation of this vulnerability could allow an unauthenticated remote attacker to execute arbitrary SQL commands on the vulnerable service when it is exposed to the Internet, potentially affecting data confidentiality, integrity, and availability. Users and administrators of affected product versions are advised to update to the latest versions immediately.

Critical Impact

Unauthenticated attackers can execute arbitrary SQL commands remotely, potentially leading to complete compromise of data confidentiality, integrity, and availability in internet-exposed Advantech IoT deployments.

Affected Products

• Advantech IoT Edge Linux Docker
• Advantech IoT Edge Windows
• Advantech IoTSuite Growth Linux Docker
• Advantech IoTSuite SaaS Composer
• Advantech IoTSuite Starter Linux Docker

Discovery Timeline

• 2026-01-12 - CVE-2025-52694 published to NVD
• 2026-01-26 - Last updated in NVD database

Technical Details for CVE-2025-52694

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists within Advantech's IoT Suite product line, which includes both containerized Linux deployments and Windows-based installations. The vulnerability allows unauthenticated remote attackers to inject and execute arbitrary SQL commands against the backend database when the affected service is exposed to the Internet.

SQL injection vulnerabilities of this nature typically arise when user-supplied input is incorporated into SQL queries without proper sanitization or parameterization. In the context of IoT management platforms, successful exploitation could grant attackers access to sensitive device telemetry, configuration data, credentials, and administrative functions stored within the database.

The impact extends across all three pillars of information security—confidentiality, integrity, and availability—meaning attackers could read sensitive data, modify database records, or disrupt service operations entirely.

Root Cause

The root cause is improper neutralization of special elements used in SQL commands (CWE-89). The affected Advantech IoT Suite components fail to properly sanitize or parameterize user input before incorporating it into SQL queries. This allows specially crafted input containing SQL syntax to alter the intended query logic and execute attacker-controlled commands against the database.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability remotely by sending malicious requests to an internet-exposed instance of the affected Advantech IoT Suite products. The low attack complexity and lack of authentication requirements make this vulnerability particularly dangerous for any deployment that is accessible from the Internet.

Typical exploitation would involve identifying input fields or API endpoints that interact with the database, then crafting SQL injection payloads to extract data, modify records, or escalate privileges within the application.

Detection Methods for CVE-2025-52694

Indicators of Compromise

• Unusual or malformed SQL syntax appearing in application logs or web server access logs
• Unexpected database queries containing SQL keywords such as UNION, SELECT, INSERT, UPDATE, DELETE, or DROP in non-standard contexts
• Database errors or exceptions indicating syntax errors from malformed injection attempts
• Evidence of data exfiltration or unauthorized database access in audit logs

Detection Strategies

• Deploy Web Application Firewalls (WAF) with SQL injection detection rules to identify and block malicious payloads
• Enable detailed logging on all Advantech IoT Suite components and forward logs to a SIEM for analysis
• Implement network monitoring to detect anomalous traffic patterns to and from the database server
• Configure database activity monitoring to alert on suspicious query patterns or unauthorized access attempts

Monitoring Recommendations

• Monitor for repeated failed authentication attempts followed by successful database access
• Set up alerts for any direct database connections from unexpected source IP addresses
• Review application and database logs regularly for evidence of SQL injection attack patterns
• Implement behavioral analysis to detect deviations from normal database query patterns

How to Mitigate CVE-2025-52694

Immediate Actions Required

• Update all affected Advantech IoT Suite products to the latest available versions immediately
• If patching is not immediately possible, restrict network access to affected services using firewall rules
• Avoid exposing affected services directly to the Internet; place them behind VPNs or other access controls
• Review database logs for any signs of prior exploitation and investigate accordingly

Patch Information

Advantech has advised users and administrators of affected product versions to update to the latest versions immediately. Refer to the CSA Security Alert AL-2026-001 for detailed patching guidance and the latest version information for each affected product.

Workarounds

• Implement network segmentation to isolate affected IoT management systems from the Internet
• Deploy a Web Application Firewall (WAF) configured with SQL injection protection rules in front of affected services
• Apply principle of least privilege to database accounts used by the application to limit the impact of potential exploitation
• Enable prepared statements and parameterized queries at the application level if custom integrations interact with the database

# Example: Firewall rule to restrict access to IoT Suite service
# Allow only trusted management networks to access the service port
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP