CVE-2026-25108
Soliton Systems K.K FileZen OS Command Injection Vulnerability
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
- 5.25% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 24 February 2026 · due 17 March 2026
- Weakness
- CWE-78
- Affected
- soliton/filezen
- Source
- vultures@jpcert.or.jp
EPSS 5.2% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.