CVE-2006-4326

Stack-based buffer overflow in Justsystem Ichitaro 9.x through 13.x, Ichitaro 2004, 2005, 2006, and Government 2006; Ichitaro for Linux; and FormLiner before 20060818 allows remote attackers to execute arbitrary code via long Unicode strings in a crafted document, as being actively exploited by malware such as Trojan.Tarodrop. NOTE: some details are obtained from third party information.

Published: 2006-08-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-4326 is rated Moderate Risk (58.4/100): CVSS High severity, with high exploitation likelihood (EPSS 4.47%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-4326

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 2026-06-15 7.67% 4.47% -3.20%
2 2025-04-12 7.39% 7.67% +0.28%
3 2025-03-30 — 7.39% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-4326

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2006-4326

Affected software / configurations for CVE-2006-4326

Vendor Product Version Raw CPE
justsystem formliner — cpe:2.3:a:justsystem:formliner:*:*:*:*:*:*:*:*
justsystem ichitaro 9.0 cpe:2.3:a:justsystem:ichitaro:9.0:*:*:*:*:*:*:*
justsystem ichitaro 10.0 cpe:2.3:a:justsystem:ichitaro:10.0:*:*:*:*:*:*:*
justsystem ichitaro 11.0 cpe:2.3:a:justsystem:ichitaro:11.0:*:*:*:*:*:*:*
justsystem ichitaro 12.0 cpe:2.3:a:justsystem:ichitaro:12.0:*:*:*:*:*:*:*
justsystem ichitaro 13.0 cpe:2.3:a:justsystem:ichitaro:13.0:*:*:*:*:*:*:*
justsystem ichitaro 2004 cpe:2.3:a:justsystem:ichitaro:2004:*:*:*:*:*:*:*
justsystem ichitaro 2005 cpe:2.3:a:justsystem:ichitaro:2005:*:*:*:*:*:*:*
justsystem ichitaro 2006 cpe:2.3:a:justsystem:ichitaro:2006:*:*:*:*:*:*:*
justsystem ichitaro_government 2006 cpe:2.3:a:justsystem:ichitaro_government:2006:*:*:*:*:*:*:*

References for CVE-2006-4326

cvelogic Threat Intelligence