What is the CVSS score of CVE-2026-21410?

CVE-2026-21410 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.5%.

How to fix or mitigate CVE-2026-21410?

Within 24 hours: Identify all InSAT MasterSCADA BUK-TS instances in your environment and isolate affected systems from untrusted network access; restrict web interface access to authorized users only via network controls. Within 7 days: Deploy Web Application Firewall (WAF) rules to block SQL injection patterns targeting the vulnerable endpoint; implement input validation and output encoding at the application layer if possible; establish continuous monitoring for exploitation attempts. Within 30 days: Work with vendor to obtain and test patches or workarounds; evaluate alternative solutions if vendor remediation is unavailable; conduct forensic analysis to determine if any compromise has occurred.

Masterscada CVE-2026-21410

CRITICAL

SQL Injection (CWE-89)

2026-02-24 ics-cert@hq.dhs.gov

RCE SQLi SCADA Masterscada

9.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft malicious SQL payload
Delivery

Submit to vulnerable web endpoint
Exploit

Inject SQL commands into database query
Execution

Execute arbitrary SQL
Impact

Achieve remote code execution

Vulnerability Assessment

Weakness	CWE CWE-89 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Parameterized queries, prepared statements MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	No special conditions — remote unauthenticated exploitation against default configurations of InSAT MasterSCADA BUK-TS main web interface with SQL injection vulnerability in database query handling.
Impact	CVSS 9.8, EPSS 0.51%. SQL injection in SCADA systems can compromise process data integrity and historical records.
Exploit ScenarioDerived	Attacker injects SQL through the web interface to extract process data, modify setpoints, or access historian databases containing operational data.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

SQL injection in InSAT MasterSCADA BUK-TS through the main web interface. ICS/SCADA system with unauthenticated SQL injection enabling full database compromise.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 9.8

SQL injection in InSAT MasterSCADA BUK-TS SCADA system.

RemediationAI

Apply vendor patch. Implement WAF rules. Isolate SCADA web interfaces from untrusted networks.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-89 SQL injection through the main web interface. All versions are affected. SCADA system vulnerability.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

A critical SQL injection vulnerability in InSAT MasterSCADA BUK-TS web interface could allow attackers to execute arbitrary code on affected systems, potentially compromising operational control systems and sensitive data. Organizations using this platform face immediate risk of system compromise and operational disruption until mitigation measures are implemented.

Business Impact: Severe

Compensating Controls

Implement WAF rules to detect and block SQL injection payloads targeting InSAT MasterSCADA endpoints; restrict network access to the web interface via firewall rules and VPN-only connectivity; disable or restrict the vulnerable endpoint if operationally feasible; implement database-level access controls and least-privilege principles; enable comprehensive logging and real-time alerting on database query anomalies and web interface access patterns; segment the MasterSCADA system from critical operational networks where possible.

Threat Intelligence Overview

EPSS Score

0.5%

Top 34% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.5%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.