Critical SQL Injection Vulnerability in Turkhotspot 5651 Loglama (CVE-2026-1617)

A critical SQL injection vulnerability, tracked as CVE-2026-1617, has been identified in Turkmesh Communication Services Inc.'s Turkhotspot 5651 Loglama software. This flaw impacts versions from 5.1.2 up to, but not including, 5.1.3. The vulnerability stems from improper neutralization of special elements within an SQL command, enabling unauthenticated attackers to inject and execute arbitrary SQL queries against the backend database. With a CVSS v3.1 Base Score of 9.8, this vulnerability poses a significant risk for data exfiltration, manipulation, or unauthorized access to the underlying system, depending on the privileges of the database user. Defenders need to immediately address this vulnerability to prevent potential compromise of sensitive information and ensure the integrity of their log management systems.

Attack Chain

1. An unauthenticated attacker identifies a vulnerable instance of Turkhotspot 5651 Loglama accessible via the internet.
2. The attacker crafts a malicious HTTP request, embedding SQL injection payloads within input parameters or URI query strings intended for database interaction.
3. The crafted HTTP request is sent to the Turkhotspot 5651 Loglama web application.
4. The vulnerable application processes the request, failing to properly sanitize or validate the attacker's input, leading to the malicious payload being directly incorporated into a SQL query.
5. The backend database executes the manipulated SQL query, granting the attacker unauthorized access to information or allowing modification of data.
6. The attacker exploits the SQL injection to exfiltrate sensitive data, manipulate existing records, or potentially gain further control over the underlying system if the database user has elevated privileges.

Impact

Successful exploitation of CVE-2026-1617 can lead to severe consequences for organizations utilizing Turkhotspot 5651 Loglama. Attackers can gain unauthorized access to critical log data, sensitive user information, or system configurations stored in the database. This could result in widespread data breaches, financial loss, reputational damage, and non-compliance with data protection regulations. The critical CVSS score of 9.8 highlights the ease of exploitation and high potential impact, which could include full compromise of the database and potentially the server hosting the application if the database user has sufficient privileges (e.g., xp_cmdshell enabled).

Recommendation

• Apply the patch for CVE-2026-1617 provided by Turkmesh Communication Services Inc. immediately to all affected Turkhotspot 5651 Loglama instances.
• Deploy the Sigma rule "Detects CVE-2026-1617 Exploitation - Generic SQL Injection Attempt" to your SIEM system and ensure webserver logs are being ingested.
• Implement a Web Application Firewall (WAF) to filter and block malicious HTTP requests containing common SQL injection patterns, protecting against CVE-2026-1617 and similar web vulnerabilities.
• Regularly review webserver logs for suspicious activity, particularly HTTP requests with unusual parameters or characters as detected by the provided Sigma rule.