Westermo WeOS 5.x starting from 5.24 allows OS command injection via a media definition.

published 2026-09-02 2 mo ago modified 2026-10-19 20 d ago also EUVD-2025-210821

cvss: 7.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-261-01 updated 2025-09-18 cvss 7.6

Westermo Network Technologies WeOS 5

Westermo Network Technologies WeOS 5 >=5.24
affected: mitigation “Westermo recommends the following mitigations which do not require a software update:” westermo.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 mo ago (2026-09-02)

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.6	CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products

Westermo WeOS

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

cisa.gov /news-events/ics-advisories/icsa-25-261-01

Sources

CVE List CVE-2025-46418
NVD CVE-2025-46418

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary