CVE-2026-25108: Soliton Systems K.K FileZen OS Command Injection Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 24 Feb 2026, 11 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 5.2%
EPSS score, percentile 92.5 of all scored records
- How severe?
- 8.7 High
CVSS v4.0 base score, given by the CNA
- What should I do?
Required action (CISA), due 17 Mar 2026: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected: V5.0.0 to V5.0.10; V4.2.1 to V4.2.8
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date for this action: 17 March 2026.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | V5.0.0 to V5.0.10 |
| Status | Versions |
|---|---|
| Affected | V4.2.1 to V4.2.8 |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
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.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2026-25108 to its Known Exploited Vulnerabilities (KEV) catalog on 24 Feb 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 17 Mar 2026.
- The CVE record was published on 13 Feb 2026, 11 days before it was added to KEV.
- The CVE record carries a CVSS v4.0 base score of 8.7 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 5.2% (percentile 92.5), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 13 Feb 2026 | CVE record published |
| 24 Feb 2026 | Added to CISA KEV |
| 26 Feb 2026 | CVE record last updated |
| 17 Mar 2026 | CISA due date for the required action |