Critical RCE Vulnerabilities Exposed in InSAT MasterSCADA BUK-TS Systems
CISA warns of severe remote code execution flaws in InSAT MasterSCADA BUK-TS across all versions, urging immediate mitigation for industrial control environments.
Critical RCE Flaws Identified in InSAT MasterSCADA BUK-TS
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has disclosed multiple critical vulnerabilities in InSAT MasterSCADA BUK-TS, a supervisory control and data acquisition (SCADA) system widely used in industrial environments. Successful exploitation of these flaws could enable remote code execution (RCE), posing severe risks to operational technology (OT) infrastructure.
Technical Details
The advisory (ICSA-26-055-01) highlights two vulnerabilities affecting all versions of InSAT MasterSCADA BUK-TS:
- CVE-2026-21410: A flaw allowing unauthenticated attackers to execute arbitrary code remotely.
- CVE-2026-21411: A secondary vulnerability (details pending) contributing to the RCE risk.
CISA’s Common Security Advisory Framework (CSAF) provides structured technical guidance for defenders, though full exploit details remain restricted to prevent abuse.
Impact Analysis
These vulnerabilities expose industrial control systems (ICS) to:
- Unauthorized system access: Attackers could gain control of SCADA workstations, manipulating processes or disrupting operations.
- Lateral movement: Compromised systems may serve as entry points to broader OT networks, including critical infrastructure.
- Data exfiltration or sabotage: RCE capabilities could facilitate theft of sensitive operational data or deployment of destructive payloads (e.g., ransomware).
Mitigation Recommendations
CISA urges organizations using InSAT MasterSCADA BUK-TS to:
- Apply vendor patches immediately once available. Monitor CISA’s advisory for updates.
- Isolate affected systems: Segment SCADA networks from corporate IT environments and restrict remote access.
- Enforce least-privilege access: Limit user permissions to minimize potential damage from exploitation.
- Monitor for anomalous activity: Deploy intrusion detection systems (IDS) to identify signs of compromise, such as unusual process commands or network traffic.
For further technical analysis, refer to the CSAF JSON file.