Delta Electronics DIAView
1. EXECUTIVE SUMMARY
- CVSS v4 9.3
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Delta Electronics
- Equipment: DIAView
- Vulnerability: Improper Limitation of a Pathname to a Restricted Directory
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow a remote attacker to read or write files on the affected device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Delta Electronics reports the following versions of DIAView industrial automation management system for providing real-time system control are affected:
- DIAView: Versions 4.2.0.0
3.2 VULNERABILITY OVERVIEW
3.2.1 Improper Limitation of a Pathname to a Restricted Directory CWE-22
Delta Electronics DIAView is vulnerable to a path traversal vulnerability, which may allow an attacker to read or write files remotely on the system.
CVE-2025-53417 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2025-53417. A base score of 9.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Chemical, Commercial Facilities, Critical Manufacturing, Energy, Transportation Systems, Water and Wastewater Systems
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
hir0ot, working with Trend Micro Zero Day Initiative, reported this vulnerability to CISA.
4. MITIGATIONS
Delta Electronics recommends users update to DIAView v4.3.0 or later.
For more information, see Delta Electronics advisory Delta-PCSA-2025-00010.
Delta Electronics offers users the following general recommendations:
- Do not click on untrusted Internet links or open unsolicited attachments in emails.
- Avoid exposing control systems and equipment to the Internet.
- Place control system networks and remote devices behind firewalls, and isolate them from the business network.
- When remote access is required, use a secure access method, such as a virtual private network (VPN).
If you have any product-related support concerns, contact Delta via the portal page for any information or materials you may require.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
5. UPDATE HISTORY
- August 7, 2025: Initial Publication
This product is provided subject to this Notification and this Privacy & Use policy.
Vendor
- Delta Electronics