CVE-2026-21410 describes a critical SQL Injection vulnerability discovered in InSAT MasterSCADA BUK-TS. This flaw allows malicious actors to inject arbitrary SQL code through the system's main web interface, potentially leading to remote code execution. All versions of MasterSCADA BUK-TS are affected, and a patch is expected from the vendor.
The SQL Injection vulnerability in MasterSCADA BUK-TS poses a severe threat to operational technology (OT) environments. An attacker successfully exploiting this vulnerability could gain unauthorized access to the underlying database, allowing them to read, modify, or delete sensitive data, including configuration settings, historical data, and user credentials. Furthermore, the ability to execute arbitrary code opens the door to complete system compromise, enabling attackers to disrupt operations, install malware, or pivot to other systems within the network. This vulnerability shares similarities with other SQL Injection attacks that have resulted in significant data breaches and operational downtime in industrial control systems.
CVE-2026-21410 was publicly disclosed on 2026-02-24. The vulnerability's criticality (CVSS 9.8) indicates a high probability of exploitation. As of this writing, no public proof-of-concept (POC) code is available, but the ease of SQL Injection exploitation suggests that it is likely to emerge. Monitor CISA and vendor advisories for updates and potential exploitation campaigns.
Organizations utilizing MasterSCADA BUK-TS in critical infrastructure environments, particularly those with limited network segmentation or inadequate input validation practices, are at the highest risk. Facilities relying on legacy configurations or shared hosting environments where the system is exposed to the public internet are also particularly vulnerable.
• windows / supply-chain: Monitor PowerShell execution for suspicious SQL commands targeting database connections.
Get-Process | Where-Object {$_.ProcessName -like '*sql*'} | Select-Object Name, Id, CPU• linux / server: Examine system logs (e.g., /var/log/auth.log, /var/log/syslog) for SQL errors or unusual database activity.
journalctl -u mysqld | grep 'error' • generic web: Use curl to test the vulnerable endpoint with various SQL injection payloads.
curl 'http://masterscada/vulnerable_endpoint?param=';disclosure
Exploit-Status
EPSS
0.51% (66% Perzentil)
CISA SSVC
CVSS-Vektor
Due to the severity and widespread impact of CVE-2026-21410, immediate action is required. The primary mitigation is to apply the vendor-provided patch as soon as it becomes available. In the interim, implement temporary workarounds such as strict input validation on all user-supplied data entering the web interface. Deploy a Web Application Firewall (WAF) with rules specifically designed to detect and block SQL Injection attempts. Regularly review and audit database access logs for suspicious activity. After applying the patch, confirm the vulnerability is resolved by attempting a controlled SQL Injection test on the vulnerable endpoint.
MasterSCADA BUK-TS auf eine Version aktualisieren, die die (SQL Injection) Schwachstelle behebt. Informationen zur neuesten Version und den Aktualisierungsanweisungen finden Sie auf der InSAT-Website.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2026-21410 is a critical SQL Injection vulnerability in InSAT MasterSCADA BUK-TS allowing attackers to potentially execute code remotely through the web interface.
Yes, all versions of MasterSCADA BUK-TS are affected by this vulnerability. Immediate action is required.
Apply the vendor-provided patch as soon as it becomes available. Until then, implement input validation and WAF rules as temporary mitigations.
While no public exploitation is confirmed, the high severity and ease of exploitation suggest a high probability of future exploitation attempts.
Refer to the InSAT website and relevant security mailing lists for the official advisory regarding CVE-2026-21410.
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