CVE-2026-25108
Soliton Systems K.K FileZen OS Command Injection Vulnerability
Soliton Systems K.K FileZen
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 24 February 2026. US federal agencies were required to remediate it by 17 March 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 5.2%, which is higher than 92.2% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2026-25108 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-25108.
What does CVE-2026-25108 affect?
CVE-2026-25108 affects Soliton Systems K.K FileZen. 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.
How severe is CVE-2026-25108?
CVE-2026-25108 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 5.2%, higher than 92.2% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 17 March 2026.
How should organisations respond to CVE-2026-25108?
Apply the vendor patch for Soliton Systems K.K FileZen as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.