CVE-2025-62582: Deltaww Diaview Auth Bypass Vulnerability

CVE-2025-62582 Overview

Delta Electronics DIAView, an industrial HMI/SCADA visualization software used for monitoring and controlling industrial processes, contains multiple vulnerabilities including a critical missing authentication flaw (CWE-306). This vulnerability allows remote attackers to access functionality without proper authentication verification, potentially compromising the integrity and confidentiality of industrial control systems.

Critical Impact

Unauthenticated remote attackers can potentially gain unauthorized access to DIAView functionality, enabling full system compromise including data theft, unauthorized modifications, and disruption of industrial operations.

Affected Products

• Delta Electronics DIAView (all versions prior to patched release)
• deltaww:diaview (CPE: cpe:2.3:a:deltaww:diaview:*:*:*:*:*:*:*:*)

Discovery Timeline

• January 16, 2026 - CVE-2025-62582 published to NVD
• January 20, 2026 - Last updated in NVD database

Technical Details for CVE-2025-62582

Vulnerability Analysis

CVE-2025-62582 is classified under CWE-306 (Missing Authentication for Critical Function), indicating that the DIAView application fails to properly enforce authentication on functionality that requires identity verification. This type of vulnerability is particularly dangerous in industrial control system (ICS) environments where DIAView is commonly deployed.

The vulnerability can be exploited remotely over the network without requiring any prior authentication or user interaction. An attacker who successfully exploits this flaw can achieve unauthorized access that impacts the confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability is the absence of authentication mechanisms for critical functions within the DIAView application. The software fails to verify that requests for sensitive operations are coming from properly authenticated users, allowing unauthenticated attackers to invoke protected functionality directly.

Attack Vector

The attack vector is network-based, meaning an attacker with network access to the DIAView installation can exploit this vulnerability remotely. The attack complexity is low, requiring no privileges or user interaction to execute. This makes the vulnerability highly accessible to potential attackers who can reach the affected system over the network.

Attackers targeting this vulnerability would typically:

1. Identify exposed DIAView installations through network reconnaissance
2. Craft requests to access protected functionality without authentication
3. Leverage the unauthorized access to extract sensitive data, modify configurations, or disrupt operations

For detailed technical information regarding exploitation mechanisms, refer to the Delta Security Advisory.

Detection Methods for CVE-2025-62582

Indicators of Compromise

• Unusual or unauthenticated network connections to DIAView service ports
• Unexpected access to DIAView administrative or configuration functions without corresponding login events
• Anomalous data access patterns or configuration changes in DIAView logs
• Network traffic from unknown or external IP addresses targeting DIAView installations

Detection Strategies

• Monitor network traffic for unauthenticated requests to DIAView service endpoints
• Implement application-level logging to capture all access attempts to critical DIAView functions
• Deploy intrusion detection systems (IDS) with signatures for known DIAView exploitation patterns
• Correlate authentication logs with function access logs to identify bypass attempts

Monitoring Recommendations

• Enable verbose logging on DIAView installations and forward logs to a centralized SIEM
• Configure network monitoring to alert on unexpected connections to DIAView services
• Establish baseline behavior for DIAView network activity and alert on deviations
• Implement real-time alerting for access to critical functions without preceding authentication events

How to Mitigate CVE-2025-62582

Immediate Actions Required

• Review the Delta Security Advisory for specific remediation guidance
• Isolate DIAView installations from untrusted networks using network segmentation
• Implement firewall rules to restrict access to DIAView only from authorized management networks
• Audit current DIAView deployments to identify potentially affected systems

Patch Information

Delta Electronics has released a security advisory addressing this vulnerability along with CVE-2025-62581. Organizations using DIAView should consult the Delta Security Advisory for information on available patches and recommended upgrade paths. Apply vendor-provided patches as soon as they become available after appropriate testing in non-production environments.

Workarounds

• Implement network segmentation to isolate DIAView systems from untrusted network zones
• Deploy a reverse proxy or application gateway with authentication enforcement in front of DIAView
• Use VPN or other secure access methods to restrict network connectivity to DIAView installations
• Enable host-based firewalls on systems running DIAView to limit inbound connections

# Example: Restrict network access to DIAView using iptables (Linux)
# Allow only specific management subnet to access DIAView
iptables -A INPUT -p tcp --dport <DIAVIEW_PORT> -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport <DIAVIEW_PORT> -j DROP