VulnerabilityAnalyzed

CVE-2026-25108

Soliton Systems K.K FileZen OS Command Injection Vulnerability

KEVHIGH 8.7EPSS 5.07%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 March 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

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.

CVSS 4.0: 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 5.07% probability · 92th percentile
CISA KEV: Listed 24 February 2026 · due 17 March 2026
Weakness: CWE-78
Affected: soliton/filezen
Source: vultures@jpcert.or.jp

CISA notes

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://jvn.jp/en/jp/JVN84622767/ ; https://nvd.nist.gov/vuln/detail/CVE-2026-25108

References

https://jvn.jp/en/jp/JVN84622767/Third Party Advisory
https://www.soliton.co.jp/support/2026/006657.htmlVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-25108US Government Resource

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.