CVE-2006-6400

Buffer overflow in JustSystems Hanako 2004 through 2006, Hanako viewer 1.x, Ichitaro 2004, Ichitaro 2005, Ichitaro Lite2, Ichitaro viewer 4.x, and Sanshiro 2005 allows remote attackers to execute arbitrary code via the (1) Keyword and (2) Title fields, related to string length fields.

Published: 2006-12-10 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-6400 is rated Moderate Risk (59.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.90%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.06% over the last day, indicating growing attacker interest. 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-2006-6400

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 2025-09-20 4.84% 5.90% +1.06%
2 2025-07-29 4.66% 4.84% +0.18%
3 2025-03-30 — 4.66% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-6400

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2006-6400

OS Trackers for CVE-2006-6400

vendor priority summary link
alpine — CVE-2006-6400: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-6400

Affected software / configurations for CVE-2006-6400

Vendor Product Version Raw CPE
justsystem hanako 2004 cpe:2.3:a:justsystem:hanako:2004:*:*:*:*:*:*:*
justsystem hanako 2005 cpe:2.3:a:justsystem:hanako:2005:*:*:*:*:*:*:*
justsystem hanako 2006 cpe:2.3:a:justsystem:hanako:2006:*:*:*:*:*:*:*
justsystem hanako_viewer 1.0 cpe:2.3:a:justsystem:hanako_viewer:1.0:*:*:*:*:*:*:*
justsystem ichitaro — cpe:2.3:a:justsystem:ichitaro:*:*:*:*:*:*:*:*
justsystem ichitaro 2005 cpe:2.3:a:justsystem:ichitaro:2005:*:*:*:*:*:*:*
justsystem ichitaro 2006 cpe:2.3:a:justsystem:ichitaro:2006:*:*:*:*:*:*:*
justsystem ichitaro_lite2 — cpe:2.3:a:justsystem:ichitaro_lite2:*:*:*:*:*:*:*:*
justsystem ichitaro_lite2 r2 cpe:2.3:a:justsystem:ichitaro_lite2:r2:*:*:*:*:*:*:*
justsystem ichitaro_viewer 4.0 cpe:2.3:a:justsystem:ichitaro_viewer:4.0:*:*:*:*:*:*:*
justsystem sanshiro 2005 cpe:2.3:a:justsystem:sanshiro:2005:*:*:*:*:*:*:*

References for CVE-2006-6400

cvelogic Threat Intelligence