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PatchSiren cyber security CVE debrief

CVE-2025-22881 Delta Electronics CVE debrief

Delta Electronics CNCSoft-G2 is affected by a heap-based buffer overflow caused by insufficient validation of user-supplied data length before copying into a fixed-length heap buffer. According to the advisory, an attacker can manipulate a user into visiting a malicious page or opening a malicious file, which may allow code execution in the context of the current process. Delta identifies affected versions as CNCSoft-G2 up to V2.1.0.10 and recommends updating to v2.1.0.20 or later.

Vendor
Delta Electronics
Product
CNCSoft-G2
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-03-04
Original CVE updated
2025-03-04
Advisory published
2025-03-04
Advisory updated
2025-03-04

Who should care

Industrial control and engineering teams using Delta Electronics CNCSoft-G2, especially administrators responsible for patching engineering workstations, restricting untrusted content, and controlling remote access. Because the issue depends on user interaction, security awareness and file/web handling practices matter as much as software updates.

Technical summary

CVE-2025-22881 is a heap-based buffer overflow in CNCSoft-G2 caused by missing length validation before copying attacker-influenced data into a fixed-size heap buffer. The source advisory supplies a CVSS 3.1 vector of AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating high impact with user interaction required. Delta's stated fix is CNCSoft-G2 v2.1.0.20 or later.

Defensive priority

High. Prioritize remediation on any CNCSoft-G2 installation that can open untrusted files or browse untrusted content, and on engineering systems that are not tightly isolated.

Recommended defensive actions

  • Update Delta Electronics CNCSoft-G2 to v2.1.0.20 or later as recommended by the vendor.
  • Inventory installations and confirm whether any systems are running CNCSoft-G2 <= V2.1.0.10.
  • Reduce exposure to malicious pages and files by restricting untrusted links, attachments, and downloads on engineering workstations.
  • Keep industrial control systems and related engineering tools off the public Internet when possible, and place them behind firewalls and network segmentation.
  • Use a secure remote access method such as a VPN when remote access is required.
  • Monitor the Delta product cybersecurity advisory and CISA advisory for any follow-up guidance or updates.

Evidence notes

The source corpus is a CISA CSAF advisory for ICSA-25-063-06 and Delta's associated product cybersecurity advisory reference. It explicitly states the vulnerability is a heap-based buffer overflow in CNCSoft-G2, that affected product coverage is CNCSoft-G2 <= V2.1.0.10, and that the recommended vendor fix is v2.1.0.20 or later. The supplied CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. No exploitation prevalence or KEV listing is present in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-22881 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-22881

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

  • CVE-2025-22881 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-22881

    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/2025/icsa-25-063-06.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-063-06

    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.