Delta Electronics CNCSoft-G2
1. EXECUTIVE SUMMARY
- CVSS v4 8.5
- ATTENTION: Low attack complexity
- Vendor: Delta Electronics
- Equipment: CNCSoft-G2
- Vulnerability: Heap-based Buffer Overflow
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to execute code remotely.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Delta Electronics reports that the following versions of CNCSoft-G2, a human-machine interface, are affected:
- CNCSoft-G2: Versions V2.1.0.10 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122
Delta Electronics CNCSoft-G2 lacks proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can manipulate users to visit a malicious page or file to leverage this vulnerability to execute code in the context of the current process.
CVE-2025-22881 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2025-22881. A base score of 8.5 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Energy, Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Trend Micro Zero Day Initiative reported this vulnerability to CISA.
4. MITIGATIONS
Delta Electronics recommends users update to CNCSoft-G2 v2.1.0.20 or later.
Delta Electronics published a product cybersecurity advisory (Delta-PCSA-2025-00003) for this issue.
For more information, please contact Delta Electronics Customer Service.
Delta Electronics recommends the following general cybersecurity practices:
- Don't click on untrusted Internet links or open unsolicited attachments in emails.
- Avoid exposing control systems and equipment to the Internet.
- Place systems and devices behind a firewall and isolate them from the business network.
- When remote access is required, use a secure access method, such as a virtual private network (VPN).
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. This vulnerability is not exploitable remotely.
5. UPDATE HISTORY
- March 4, 2025: Initial Publication
This product is provided subject to this Notification and this Privacy & Use policy.
Vendor
- Delta Electronics