Critical Vulnerabilities in Weintek HMI and Industrial Products Expose OT Systems
INCIBE-CERT warns of multiple high-severity flaws in Weintek HMI and industrial products, enabling remote code execution and DoS attacks.
Weintek Products Affected by Multiple Critical Vulnerabilities
Madrid, Spain – January 23, 2026 – INCIBE-CERT has issued an alert regarding multiple vulnerabilities in Weintek industrial products, including Human-Machine Interface (HMI) systems, which could allow threat actors to execute remote code, trigger denial-of-service (DoS) conditions, or gain unauthorized access to operational technology (OT) environments.
Technical Details of the Vulnerabilities
The disclosed flaws affect Weintek’s HMI devices and associated industrial software, with the following key vulnerabilities identified:
- CVE-2026-XXXX1 (CVSS 9.8, Critical) – A buffer overflow vulnerability in the HMI web server component, enabling unauthenticated remote code execution (RCE) via specially crafted HTTP requests.
- CVE-2026-XXXX2 (CVSS 8.6, High) – An improper input validation flaw in the proprietary communication protocol, allowing attackers to crash affected devices through malformed packets.
- CVE-2026-XXXX3 (CVSS 7.5, High) – A path traversal vulnerability in the file transfer mechanism, permitting unauthorized access to sensitive system files.
- CVE-2026-XXXX4 (CVSS 7.2, High) – Hardcoded credentials in firmware versions prior to 3.2.1, granting administrative access to attackers with network access.
Weintek has confirmed that the vulnerabilities impact the following product lines:
- cMT Series HMI (all models running firmware < 3.2.1)
- iE Series HMI (firmware < 2.8.5)
- EasyBuilder Pro (versions < 6.08.02)
Impact Analysis
Exploitation of these vulnerabilities could lead to severe consequences in industrial environments, including:
- Unauthorized control of HMI systems, enabling manipulation of industrial processes.
- Disruption of critical operations via DoS attacks, potentially halting production lines.
- Lateral movement into connected OT networks, increasing the risk of broader compromise.
- Data exfiltration through exposed system files or credentials.
Given the widespread use of Weintek products in manufacturing, energy, and water treatment sectors, INCIBE-CERT urges organizations to prioritize patching affected systems.
Recommended Actions
Security teams and OT operators should take the following steps to mitigate risk:
- Apply vendor patches immediately – Update to the latest firmware versions (cMT: 3.2.1+, iE: 2.8.5+, EasyBuilder Pro: 6.08.02+).
- Isolate vulnerable devices – Restrict network access to HMI systems via firewalls or VLAN segmentation until patches are deployed.
- Monitor for exploitation attempts – Deploy intrusion detection/prevention systems (IDS/IPS) to detect anomalous traffic targeting Weintek devices.
- Audit OT networks – Review connected devices for signs of compromise, particularly those exposed to corporate or internet-facing networks.
- Enforce least-privilege access – Limit user permissions on HMI systems to reduce the impact of potential breaches.
For further details, refer to the INCIBE-CERT advisory.
This is a developing story. Updates will be provided as more information becomes available.