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CVE-2006-6400

19
FAUCET Score

CVE-2006-6400 describes a buffer overflow vulnerability in several JustSystems products, including Hanako 2004-2006, Ichitaro 2004-2005, and their respective viewers. This flaw allows remote attackers to execute arbitrary code by manipulating the Keyword and Title fields due to improper handling of string lengths. With a CVSS score of 6.8, this vulnerability is of medium severity, indicating that an attacker could achieve partial confidentiality, integrity, and availability impact with medium attack complexity over a network. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2004CPE matchmatch criteria
cpe:2.3:a:justsystem:hanako:2004:*:*:*:*:*:*:*
2005CPE matchmatch criteria
cpe:2.3:a:justsystem:hanako:2005:*:*:*:*:*:*:*
2006CPE matchmatch criteria
cpe:2.3:a:justsystem:hanako:2006:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:justsystem:hanako_viewer:1.0:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:justsystem:ichitaro:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.03%
Probability of exploitation in next 30 days
EPSS Percentile
86.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0303 is in the 79th percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / jp/JVN%2347272891/index.html
secunia.com / advisories/23185
Vendor Advisory
securitytracker.com / id
justsystem.co.jp / info/pd6005.html
lac.co.jp / business/sns/intelligence/SNSadvisory_e/92_e.html
PatchVendor Advisory
securityfocus.com / bid/21445
vupen.com / english/advisories/2006/4857