# Westermo WeOS 5 OS command injection flaw

Published: 2025-09-18 · Severity: routine · Sectors: energy, infrastructure, manufacturing, government-national
Canonical: https://vorant.io/reports/afd3d623-39c1-5119-a90d-08ac4a4a76da/westermo-weos-5-os-command-injection-flaw

> OS command injection in Westermo WeOS 5 allows admin-authenticated attackers to escalate privileges remotely; no active exploitation reported.

Westermo Network Technologies has disclosed an OS command injection vulnerability in WeOS 5, an industrial network operating system deployed across critical infrastructure sectors including energy, water systems, and manufacturing worldwide. The flaw, tracked as CVE-2025-46418, stems from unsafe handling of media definitions and allows attackers with administrative credentials to inject and execute OS commands with elevated privileges beyond their normal scope. The vulnerability affects WeOS 5 version 5.24 and later.

The attack requires administrative access, network connectivity, and user interaction (UI component), giving it CVSS v4 score of 8.7 and CVSS v3.1 score of 7.6. No public exploitation has been reported. Westermo recommends restricting administrative account access to trusted parties and enforcing strong password practices. CISA advises organizations to isolate control system networks from the internet, place them behind firewalls, and use VPNs for remote access. A software update from Westermo has not yet been announced.

## Mentioned in this report

- Vulnerabilities: CVE-2025-46418

Source reporting: https://www.cisa.gov/news-events/ics-advisories/icsa-25-261-01

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