CVEs / CVE-2026-25108

CVE-2026-25108: Soliton Systems K.K FileZen OS Command Injection Vulnerability

Known exploited in the CISA KEV catalog since 24 Feb 2026
high 8.8 CVSS 3.1 (NVD)
EPSS 5.24% chance of exploitation in the next 30 days, higher than 92% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

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, Known Exploited Vulnerabilities catalog

Description

FileZen contains an OS command injection vulnerability. When FileZen Antivirus Check Option is enabled, a logged-in user may send a specially crafted HTTP request to execute an arbitrary OS command.
The CVE record, via NVD · published 13 Feb 2026 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Soliton Systems K.K. FileZen	V5.0.0 to V5.0.10	—
Soliton Systems K.K. FileZen	V4.2.1 to V4.2.8	—

Exploitation

In CISA KEV since	24 Feb 2026
Due date for US federal agencies	17 Mar 2026
Used in ransomware campaigns	Unknown
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.

Severity

CVSS 3.1	8.8 high `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-78

References

CVE-2026-25108 on NVD
CVE-2026-25108 in the CISA KEV catalog
https://jvn.jp/en/jp/JVN84622767/ (cited by CISA)
https://jvn.jp/en/jp/JVN84622767/ Third Party Advisory
https://www.soliton.co.jp/support/2026/006657.html Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-25108 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.