Unprotected Windows messaging channel ('Shatter') issue exists in Defense Platform Home Edition Ver.3.9.51.x and earlier. If an attacker sends a specially crafted message to the specific process of the Windows system where the product is running, arbitrary code may be executed with SYSTEM privilege.
Conclusion & alert: CVE-2025-20094 is rated Low Risk (39.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.04%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-19 | 0.10% | 0.04% | -0.05% |
| 2 | 2026-03-16 | 0.04% | 0.10% | +0.05% |
| 3 | 2025-02-07 | — | 0.04% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.8 | 3.0 | HIGH |
|
2.0 | 6.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| hummingheads | defense_platform | <= 3.9.51.0 | cpe:2.3:a:hummingheads:defense_platform:*:*:*:*:home:*:*:* |
| URL | Tags |
|---|---|
| https://jvn.jp/en/jp/JVN66673020/ | Third Party Advisory |
| https://www.hummingheads.co.jp/dep/storelist/ | Product |