Critical Stack-Based Buffer Overflow Vulnerability in Delta Electronics ASDA-Soft (CVE-2026-XXXXX)

Critical Stack-Based Buffer Overflow in Delta Electronics ASDA-Soft Disclosed

Madrid, Spain – February 18, 2026 – Spain’s National Cybersecurity Institute (INCIBE) has issued an urgent advisory regarding a critical stack-based buffer overflow vulnerability in Delta Electronics ASDA-Soft, a software suite used for configuring and managing industrial servo drives. The flaw, tracked as CVE-2026-XXXXX, could allow threat actors to execute arbitrary code remotely, posing severe risks to industrial control systems (ICS) and operational technology (OT) environments.

Technical Details

The vulnerability stems from improper input validation in ASDA-Soft’s communication protocol handling. Specifically:

• Affected Software: Delta Electronics ASDA-Soft (versions prior to the patched release)
• Vulnerability Type: Stack-based buffer overflow (CWE-121)
• Attack Vector: Remote exploitation via crafted network packets
• Impact: Unauthenticated remote code execution (RCE) with system-level privileges
• CVSS Score: Pending (expected to be Critical, 9.0–10.0)

The flaw occurs when ASDA-Soft processes maliciously crafted data packets, leading to memory corruption. Successful exploitation could enable attackers to take full control of the affected system, disrupt industrial processes, or pivot to other critical infrastructure components.

Impact Analysis

Delta Electronics ASDA-Soft is widely deployed in manufacturing, automation, and robotics sectors, particularly in:

• Automotive assembly lines
• Packaging and material handling systems
• CNC machinery and precision motion control

A successful attack could result in:

• Operational downtime due to system crashes or malicious reconfiguration
• Safety risks if servo drives are manipulated to cause physical damage
• Lateral movement within OT networks, potentially compromising additional ICS assets
• Data exfiltration or ransomware deployment in converged IT/OT environments

Recommendations

INCIBE and Delta Electronics urge organizations to take immediate action:

1. Apply Patches: Update ASDA-Soft to the latest version (contact Delta Electronics support for the patched release).
2. Network Segmentation: Isolate ASDA-Soft systems from corporate networks and the internet. Use firewalls to restrict access to trusted IPs only.
3. Monitor Traffic: Deploy intrusion detection/prevention systems (IDS/IPS) to detect anomalous packet patterns targeting ASDA-Soft.
4. Least Privilege: Restrict user permissions for ASDA-Soft to minimize potential damage from exploitation.
5. Incident Response: Prepare containment measures for potential breaches, including backup configurations for servo drives.

For further details, refer to INCIBE’s official advisory.

This vulnerability underscores the critical need for robust security practices in OT environments, where legacy software and unpatched systems remain prevalent.