"FFRI yarai", "FFRI yarai Home and Business Edition" and their OEM products handle exceptional conditions improperly, which may lead to denial-of-service (DoS) condition. Affected products and versions are as follows: FFRI yarai versions 3.4.0 to 3.4.6 and 3.5.0, FFRI yarai Home and Business Edition version 1.4.0, InfoTrace Mark II Malware Protection (Mark II Zerona) versions 3.0.1 to 3.2.2, Zerona / Zerona PLUS versions 3.2.32 to 3.2.36, ActSecure χ versions 3.4.0 to 3.4.6 and 3.5.0, Dual Safe Powered by FFRI yarai version 1.4.1, EDR Plus Pack (Bundled FFRI yarai versions 3.4.0 to 3.4.6 and 3.5.0), and EDR Plus Pack Cloud (Bundled FFRI yarai versions 3.4.0 to 3.4.6 and 3.5.0).
Conclusion & alert: CVE-2023-39341 is rated Low Risk (15.5/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.03%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.
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 | 2025-11-21 | 0.07% | 0.03% | -0.05% |
| 2 | 2025-11-18 | 0.02% | 0.07% | +0.05% |
| 3 | 2025-04-15 | — | 0.02% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 3.3 | 3.1 | LOW |
|
1.8 | 1.4 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ffri | dual_safe | 1.4.1 | cpe:2.3:a:ffri:dual_safe:1.4.1:*:*:*:*:*:*:* |
| ffri | ffri_yarai | >= 3.4.0, <= 3.4.6 | cpe:2.3:a:ffri:ffri_yarai:*:*:*:*:-:*:*:* |
| ffri | ffri_yarai | 1.4.0 | cpe:2.3:a:ffri:ffri_yarai:1.4.0:*:*:*:home_and_business:*:*:* |
| ffri | ffri_yarai | 3.5.0 | cpe:2.3:a:ffri:ffri_yarai:3.5.0:*:*:*:-:*:*:* |
| soliton | infotrace_mark_ii_malware_protection | >= 3.0.1, <= 3.2.2 | cpe:2.3:a:soliton:infotrace_mark_ii_malware_protection:*:*:*:*:*:*:*:* |
| soliton | zerona | >= 3.2.32, <= 3.2.36 | cpe:2.3:a:soliton:zerona:*:*:*:*:*:*:*:* |
| soliton | zerona_plus | >= 3.2.32, <= 3.2.36 | cpe:2.3:a:soliton:zerona_plus:*:*:*:*:*:*:*:* |
| nec | actsecure_x_managed_security_service | >= 3.4.0, <= 3.4.6 | cpe:2.3:a:nec:actsecure_x_managed_security_service:*:*:*:*:*:*:*:* |
| nec | actsecure_x_managed_security_service | 3.5.0 | cpe:2.3:a:nec:actsecure_x_managed_security_service:3.5.0:*:*:*:*:*:*:* |
| skygroup | edr_plus_pack | >= 3.4.0, <= 3.4.6 | cpe:2.3:a:skygroup:edr_plus_pack:*:*:*:*:*:*:*:* |
| skygroup | edr_plus_pack | 3.5.0 | cpe:2.3:a:skygroup:edr_plus_pack:3.5.0:*:*:*:*:*:*:* |
| skygroup | edr_plus_pack_cloud | >= 3.4.0, <= 3.4.6 | cpe:2.3:a:skygroup:edr_plus_pack_cloud:*:*:*:*:*:*:*:* |
| skygroup | edr_plus_pack_cloud | 3.5.0 | cpe:2.3:a:skygroup:edr_plus_pack_cloud:3.5.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://jvn.jp/en/jp/JVN42527152/ | Third Party Advisory |
| https://www.ffri.jp/security-info/index.htm | Vendor Advisory |
| https://www.skyseaclientview.net/news/230807_01/ | Third Party Advisory |
| https://www.soliton.co.jp/support/zerona_notice_2023.html | Third Party Advisory |
| https://www.sourcenext.com/support/i/2023/230718_01 | Third Party Advisory |
| https://www.support.nec.co.jp/View.aspx?id=3140109240 | Permissions Required |