Delta Electronics ASDA-Soft Stack-Based Buffer Overflow Vulnerability
Summary
CISA ICS-CERT published advisory ICSA-26-106-01 disclosing a stack-based buffer overflow vulnerability (CVE-2026-5726) in Delta Electronics ASDA-Soft versions 7.2.0.0 through 7.2.2.0. Successful exploitation could allow an attacker to execute arbitrary code on affected systems. Delta Electronics has released version 7.2.6.0 as the vendor fix. The vulnerability has a CVSS v3.1 base score of 7.8 (HIGH severity) and affects the Critical Manufacturing sector worldwide.
What changed
CISA ICS-CERT published advisory ICSA-26-106-01 detailing a stack-based buffer overflow vulnerability in Delta Electronics ASDA-Soft software. The flaw (CVE-2026-5726, CWE-121) is triggered during parsing of malformed .par files and could allow arbitrary code execution. The vulnerability affects versions 7.2.2.0 and earlier. Delta Electronics has issued version 7.2.6.0 as the vendor fix and recommends affected users upgrade immediately. CISA recommends additional mitigations including network isolation, firewall placement, VPN use for remote access, and avoiding untrusted links or attachments.
Organizations using Delta Electronics ASDA-Soft in industrial control system environments should assess whether they are running affected versions (7.2.0.0 through 7.2.2.0) and apply the vendor-issued patch (v7.2.6.0). Critical infrastructure operators in the Critical Manufacturing sector should prioritize patching, restrict exposure of control systems to the internet, and implement defense-in-depth controls per CISA's recommended practices. No known public exploitation has been reported at this time.
What to do next
- Upgrade Delta Electronics ASDA-Soft to v7.2.6.0 or later
- Contact Delta Electronics via https://www.deltaww.com/en-US/service-support/contact-us?type=1 for product-related support
Archived snapshot
Apr 17, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
ICS Advisory
Delta Electronics ASDA-Soft
Release Date
April 16, 2026
Alert Code ICSA-26-106-01 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF
Summary
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code.
The following versions of Delta Electronics ASDA-Soft are affected:
- ASDA-Soft <=V7.2.2.0
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.8 | Delta Electronics | Delta Electronics ASDA-Soft | Stack-based Buffer Overflow |
Background
- Critical Infrastructure Sectors: Critical Manufacturing
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Taiwan
Vulnerabilities
A stack-based buffer overflow vulnerability is triggered in ASDA-Soft version 7.2.0.0 during the parsing of malformed .par files.
Affected Products
Delta Electronics ASDA-Soft
Vendor:
Delta Electronics Product Version:
Delta Electronics ASDA-Soft: <=V7.2.2.0 Product Status:
known_affected
Remediations
Vendor fix
Delta Electronics recommends users download and upgrade ASDA-Soft to v7.2.6.0 or later. If you have any product-related support concerns, contact Delta via the portal page at https://www.deltaww.com/en-US/service-support/contact-us?type=1 for any information or materials you may require.
https://www.deltaww.com/en-US/service-support/contact-us?type=1
Mitigation
Delta Electronics provides 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).
Mitigation
For more information, see Delta Electronics advisory Delta-PCSA-2026-00007 athttps://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2026-00007_ASDA-Soft%20Stack-based%20Buffer%20Overflow%20Vulnerability%20(CVE-2026-5726).pdf
https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2026-00007_ASDA-Soft%20Stack-based%20Buffer%20Overflow%20Vulnerability%20(CVE-2026-5726).pdf
Relevant CWE: CWE-121 Stack-based Buffer Overflow
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Acknowledgments
- Feng Xiong of TrendAI Zero Day Initiative reported this vulnerability to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
Do not click web links or open attachments in unsolicited email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.
Revision History
- Initial Release Date: 2026-04-16
| Date | Revision | Summary |
|---|---|---|
| 2026-04-16 | 1 | Initial Publication |
Legal Notice and Terms of Use
This product is provided subject to this Notification and this Privacy & Use policy.
Vendor
- Delta Electronics
Tags
Sector: Critical Manufacturing Sector Topics: Industrial Control System Vulnerabilities, Industrial Control Systems
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