CVE-2025-6377: 
NixOS vulnerability analysis and mitigation

A remote code execution security issue exists in the Rockwell Automation Arena® software, identified as CVE-2025-6377. The vulnerability was discovered and reported by Zero Day Initiative (ZDI) and affects Arena versions 16.20.08 and earlier. The issue was disclosed on July 09, 2025, and involves a crafted DOE (Design of Experiments) file that can force Arena Simulation to write beyond the boundaries of an allocated object (Vendor Advisory).

The vulnerability is classified with a CVSS v3.1 base score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, and a CVSS v4.0 score of 7.1 (HIGH) with the vector string CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. The vulnerability is categorized under CWE-787 (Out-of-bounds Write) and CWE-20 (Improper Input Validation) (NVD).

If successfully exploited, this vulnerability allows a threat actor to execute arbitrary code on the target system. The severity of the impact is heightened when the software runs under administrator context. The vulnerability affects confidentiality, integrity, and availability of the system, all rated as High in the CVSS scoring (Vendor Advisory).

Rockwell Automation has released version 16.20.09 which addresses this vulnerability. Users are strongly advised to update to the corrected version. For users unable to upgrade, Rockwell recommends applying security best practices and using Stakeholder-Specific Vulnerability Categorization to generate environment-specific prioritization (Vendor Advisory).