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Exploited vulnerability · CISA KEV

Is CVE-2026-25108 exploited? Yes: in CISA KEV since 24 Feb 2026

Gociux · Soliton Systems K.K FileZen · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-25108, Soliton Systems K.K FileZen OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 24 Feb 2026, 11 days after it was published. It affects Soliton Systems K.K FileZen. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 24 Feb 2026
ransomwareNot knownno confirmed use
EPSStop 10%more likely than most to be exploited
severity8.8CVSS 3.0 · high
US federal due17 Mar 2026BOD 22-01 deadline

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.

VendorSoliton Systems K.K (1 exploited CVE in KEV)
ProductFileZen
VulnerabilitySoliton Systems K.K FileZen OS Command Injection Vulnerability
WeaknessCWE-78
Published13 Feb 2026
Added to KEV24 Feb 2026
Reported by (CNA)jpcert

What to do

  1. Check whether you run it. Look for FileZen in your asset inventory, including appliances and cloud images. Stack check lists every exploited Soliton Systems K.K CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 13 Feb 2026.
  4. Get told next time. Email alerts when CISA adds a CVE for Soliton Systems K.K.

References

Questions

Is CVE-2026-25108 being exploited?

Yes. CISA added CVE-2026-25108 to the Known Exploited Vulnerabilities catalog on 24 Feb 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-25108 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2026-25108?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Soliton Systems K.K's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected FileZen and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in February 2026 · act-now radar.

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