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Known exploited · Soliton Systems K.K

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

What it is

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.

Added February 24, 2026Due March 17, 2026CISA KEV catalog 2026.10.01

Product
FileZen
Added to KEV
February 24, 2026
CISA due date
March 17, 2026
Ransomware use
Unknown

What CISA requires

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

Forensic triage

No

What to do now

  1. Find every instance of FileZen you run, including the forgotten ones, and check its version against the vendor advisory.
  2. Apply the vendor's fix or mitigation, before March 17, 2026 if you are bound by CISA's deadline, sooner if it faces the internet.
  3. Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
  4. Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops OS command injection payloads, including Shellshock.

References

CVE-2026-25108 in the National Vulnerability Database

The Dome

Block it at the edge while you patch

The Dome's WAF runs the OWASP Core Rule Set in blocking mode and stops OS command injection payloads, including Shellshock before they reach your application.

See the Dome

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.