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CVE-2026-21410: Critical Vulnerability in InSAT MasterSCADA

A critical SQL Injection vulnerability exists in InSAT MasterSCADA BUK-TS, allowing remote code execution via its web interface. Immediate action is required to mitigate risks associated with this vulnerability.

CRITICALCVSS 9.3 · Published February 24, 2026

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InSAT MasterSCADA BUK-TS is susceptible to SQL Injection through its main web interface. Malicious users that use the vulnerable endpoint are potentially able to cause remote code execution. This vulnerability is classified as critical, with a CVSS score of 9.3, indicating a high severity level that demands immediate attention from organizations utilizing this product.

Risk to organizations includes unauthorized access to sensitive data and potential disruption of services, making it imperative for affected entities to prioritize remediation efforts. The exploitation status remains uncertain, but the critical nature of this vulnerability necessitates prompt actions.

Organizations should prioritize patching immediately to safeguard against potential exploitation. The SQL Injection vulnerability in question poses a significant threat, and proactive measures are essential to mitigate associated risks.

With the publication date of February 24, 2026, organizations are advised to stay vigilant and monitor for updates regarding this vulnerability. Given the potential for remote code execution, immediate action is necessary.

Vulnerability Details

The vulnerability, identified as CWE-89, specifically targets SQL Injection in the InSAT MasterSCADA BUK-TS product. With a critical CVSS score of 9.3, the vulnerability allows attackers to exploit the main web interface of the application. The potential impact includes high confidentiality, integrity, and availability risks.

The details are as follows:

Attribute

Details

CVSS Score

9.3

Attack Vector

Network

Impact

High

Technical Analysis

The root cause of this vulnerability lies in inadequate input validation, allowing attackers to inject malicious SQL queries via the web interface. This can lead to unauthorized access to the database, enabling remote code execution. The attack vector is network-based, requiring no user interaction or privileges, thus amplifying the threat.

Organizations should implement measures to validate inputs and sanitize database queries to mitigate this risk effectively. Regular security assessments and code reviews are essential to identify and remediate vulnerabilities at an early stage.

Risk & Impact Analysis

Real-world deployment risks associated with this vulnerability are significant. Attackers may leverage the SQL Injection flaw to gain unauthorized access to sensitive data, potentially leading to data breaches or system compromises. The blast radius for organizations is extensive, as the vulnerability can affect not only the primary target but also connected systems and networks.

Given the high CVSS score and potential for exploitation, organizations should assess their exposure to this vulnerability and prioritize patching efforts accordingly. The urgency of addressing this vulnerability cannot be overstated.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

All versions of InSAT MasterSCADA prior to the vendor's patch are affected by this vulnerability. Organizations should ensure that they have applied the latest updates.

Mitigation & Remediation

Organizations should prioritize patching immediately. The vendor has released updates to address this vulnerability; ensure that you upgrade to the latest version of InSAT MasterSCADA. If patches are not available, consider implementing input validation and sanitization measures as workarounds. Additionally, network segmentation and monitoring should be put in place to limit exposure.

For comprehensive security assessments, organizations might consider utilizing penetration testing services to identify any potential weaknesses.

Detection Guidance

Security teams should monitor for unusual log entries indicating SQL Injection attempts. Behavioral anomalies, such as unexpected database access patterns or unauthorized user actions, should also be investigated. Implementing network signatures to detect malicious traffic targeting the vulnerable endpoint is essential.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability underscores the need for organizations to invest in proactive security measures. SQL Injection vulnerabilities continue to be prevalent, often due to inadequate input validation practices. Organizations should learn from such incidents and implement robust security frameworks to mitigate risks.

This incident reflects a broader trend of increased exploitation of web application vulnerabilities. Security teams should prioritize continuous monitoring and assessment of their web applications to address potential weaknesses. For further insights on effective security practices, consider reviewing our penetration testing methodology and the importance of having a comprehensive vulnerability management program in place.

Additionally, reviewing our insights on API penetration testing can provide valuable guidance in fortifying application security.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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