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CVE-2024-39883 Delta Electronics CVE debrief

Delta Electronics CNCSoft-G2 contains a heap-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. The vulnerability affects CNCSoft-G2 version 2.0.0.5. CISA published the initial advisory on July 9, 2024, with an update (Update A) on February 18, 2025 that added the fixed version information to mitigate CVE-2025-22880. Delta Electronics has released version 2.1.0.20 or later to address this vulnerability.

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 using Delta Electronics CNCSoft-G2 for CNC machine control and programming, particularly in manufacturing and industrial environments. System administrators responsible for industrial control system security and patch management should prioritize this update.

Technical summary

CVE-2024-39883 is a heap-based buffer overflow in Delta Electronics CNCSoft-G2 v2.0.0.5. The application fails to validate the length of user-supplied data before copying it to a fixed-length heap-based buffer. This vulnerability can be triggered when a user visits a malicious webpage or opens a malicious file, allowing an attacker to execute arbitrary code in the context of the current process. The vulnerability has a CVSS 3.1 score of 7.8 (HIGH) with attack vector LOCAL, attack complexity LOW, privileges required NONE, and user interaction REQUIRED. Delta Electronics has released version 2.1.0.20 to remediate this issue.

Defensive priority

HIGH

Recommended defensive actions

  • Update Delta Electronics CNCSoft-G2 to version 2.1.0.20 or later as recommended by the vendor.
  • Do not click on untrusted Internet links or open unsolicited email attachments.
  • Avoid exposing control systems and equipment to the Internet.
  • Place control systems and devices behind firewalls and isolate them from business networks.
  • Use secure remote access methods such as VPNs when remote access is required.
  • Review Delta's security advisory Delta-PCSA-2025-00002 for additional technical details.
  • Contact Delta Electronics support through their portal for product-related assistance.

Evidence notes

Vulnerability is a heap-based buffer overflow in CNCSoft-G2 v2.0.0.5. Attack vector requires user interaction (visiting malicious page or opening malicious file). CVSS 3.1 score: 7.8 (HIGH).

Sources and references

Verified primary and authoritative sources

  • CVE-2024-39883 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-39883

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

  • CVE-2024-39883 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-39883

    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.