# CVE-2025-59887: Improper authentication of library files in the Eaton UPS Companion software installer could lead to arbitrary code…

Source: https://junglewise.ai/threats/cve-2025-59887-improper-authentication-of-library-files-in-the-eaton-ups  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-26  
License: CC BY 4.0 with a link back

CVE-2025-59887 · Severity: high · CVSS 8.6 · Published 2025-12-26

Improper authentication of library files in the Eaton UPS Companion software installer could lead to arbitrary code execution of an attacker with the access to the software package.  This security issue has been fixed in the latest version of EUC which is available on the Eaton download center.

Technologies: [Eaton Ups Companion](https://junglewise.ai/threats/technologies/ups-companion). Vendors: [Eaton](https://junglewise.ai/threats/vendors/eaton).

## Quick answers

**Is CVE-2025-59887 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-59887 being exploited in the wild.

**How severe is CVE-2025-59887?** High severity, with a CVSS score of 8.6, published 26 December 2025.

**Which products and versions are affected?** Eaton Ups Companion. The advisory does not name versions.

**Is there a fix for CVE-2025-59887?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-59887?** Check whether you run Eaton Ups Companion. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Eaton Ups Companion

## Related threats

- [Due to insecure library loading in the Eaton UPS Companion software executable, an attacker with access to the…](https://junglewise.ai/threats/cve-2025-67450-due-to-insecure-library-loading-in-the-eaton-ups-companion)
- [Improper quotation in search paths in the Eaton UPS Companion software installer could lead to arbitrary code…](https://junglewise.ai/threats/cve-2025-59888-improper-quotation-in-search-paths-in-the-eaton-ups-companion)