---
id: "CVE-2026-25108"
kind: "vulnerability"
aliases: ["CVE-2026-25108"]
title: "soliton filezen: FileZen contains an OS command injection vulnerability"
severity: "high"
cvss: 8.8
epss: null
exploited: true
status: "open"
category: "other"
products: [{"name": "Soliton Systems K.K FileZen", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "soliton filezen", "fixed": ["5.0.11"], "affected": ">= 4.2.1, < 5.0.11", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "file-transfer", "filezen", "other", "self-hosted"]
not_affected_if: []
published_at: "2026-02-13T04:15:53+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-25108", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25108", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# soliton filezen: FileZen contains an OS command injection vulnerability

Soliton Systems FileZen, a file transfer product, has an OS command injection flaw triggered by a specially crafted HTTP request sent by a logged-in user. An attacker who can log in can run operating system commands on the server.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Soliton Systems K.K FileZen affected ? fixed ?
- vendor:soliton filezen affected >= 4.2.1, < 5.0.11 fixed 5.0.11

## Fix

Apply the vendor mitigations per CISA guidance; the source does not name a fixed version. If no mitigation is available, discontinue use of the product.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-25108
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-25108

## From the sources

Soliton Systems K.K FileZen contains an OS command injection vulnerability when an user logs-in to the affected product and sends a specially crafted HTTP request.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_