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CVE-2024-39880 Delta Electronics CVE debrief

Delta Electronics CNCSoft-G2 contains a stack-based buffer overflow vulnerability due to improper validation of user-supplied data length before copying to a fixed-length buffer. An attacker can exploit this by convincing a target to visit a malicious page or open a malicious file, resulting in arbitrary code execution in the context of the current process. This vulnerability affects CNCSoft-G2 version 2.0.0.5. CISA published the initial advisory on July 9, 2024, with an update on February 18, 2025 that added the fixed version information to the mitigations section. The vulnerability carries a HIGH severity CVSS 3.1 score of 7.8, indicating significant risk to affected industrial control systems.

Vendor
Delta Electronics
Product
CNCSoft-G2
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-07-09
Original CVE updated
2025-02-18
Advisory published
2024-07-09
Advisory updated
2025-02-18

Who should care

Organizations operating Delta Electronics CNCSoft-G2 in manufacturing, industrial automation, and CNC machining environments. Security teams responsible for OT/ICS asset protection and patch management should prioritize this update due to the HIGH severity rating and potential for arbitrary code execution.

Technical summary

CVE-2024-39880 is a stack-based buffer overflow in Delta Electronics CNCSoft-G2 version 2.0.0.5. The vulnerability exists because the application fails to properly validate the length of user-supplied data before copying it to a fixed-length stack-based buffer. Exploitation requires local attack vector with user interaction—specifically, a target must visit a malicious page or open a malicious file. Successful exploitation grants the attacker code execution in the context of the current process. CVSS 3.1 vector: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The vendor released version 2.1.0.20 to address this vulnerability.

Defensive priority

high

Recommended defensive actions

  • Update Delta Electronics CNCSoft-G2 to version 2.1.0.20 or later as recommended by the vendor
  • Review Delta-PCSA-2025-00002 security advisory for additional technical details
  • Implement network segmentation to isolate CNCSoft-G2 systems from business networks and the Internet
  • Block untrusted Internet links and unsolicited email attachments through security controls
  • Use VPN for any required remote access to affected systems
  • Apply CISA ICS recommended practices for defense-in-depth security
  • Contact Delta Electronics support through their portal for product-related assistance

Evidence notes

CISA CSAF advisory ICSA-24-191-01 provides the authoritative technical description and remediation guidance. The advisory confirms affected product as Delta Electronics CNCSoft-G2 version 2.0.0.5.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-39880 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-39880

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-39880 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-39880

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-191-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-191-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.