How severe is CVE-2007-5687?

CVE-2007-5687 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2007-5687 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5687?

CVE-2007-5687 primarily affects Justsystem Ichitaro. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-5687?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2007-5687 published?

CVE-2007-5687 was published on 2007-10-28 and last updated on 2026-06-16.

CVE-2007-5687

CVE-2007-5687 is a critical-severity vulnerability in Justsystem Ichitaro with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Justsystem Ichitaro
Published: 2007-10-28
Last modified: 2026-06-16

Description

Multiple buffer overflows in the rich text processing functionality in JustSystems Ichitaro 2004 through 2007, 11 through 13, and other versions allow remote attackers to execute arbitrary code via a long (1) pard field or (2) font name in the fcharset0 field, which is not properly handled in (a) JSTARO4.OCX; or (3) a long title, which is not properly handled by (b) TJSVDA.DLL.

Frequently asked questions

What is CVE-2007-5687?: Multiple buffer overflows in the rich text processing functionality in JustSystems Ichitaro 2004 through 2007, 11 through 13, and other versions allow remote attackers to execute arbitrary code via a long (1) pard field or (2) font name in the fcharset0 field, which is not properly handled in (a) JSTARO4.OCX; or (3) a long title, which is not properly handled by (b) TJSVDA.DLL.
How severe is CVE-2007-5687?: CVE-2007-5687 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2007-5687 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5687?: CVE-2007-5687 primarily affects Justsystem Ichitaro. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-5687?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2007-5687 published?: CVE-2007-5687 was published on 2007-10-28 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:justsystem:ichitaro:11.0:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:12.0:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:13.0:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:2004:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:2005:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:2006:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:linux:*:*:*:*:*:*:*
cpe:2.3:a:justsystem:ichitaro:lite2:*:*:*:*:*:*:*

More vulnerabilities in Justsystem Ichitaro

CVE-2008-0223 — Critical (CVSS 9.3): Buffer overflow in JustSystems JSFC.DLL, as used in multiple JustSystems products such as Ichitaro, allows remote…
CVE-2007-6436 — Critical (CVSS 9.3): Stack-based buffer overflow in JSGCI.DLL in JustSystems Ichitaro 2005, 2006, and 2007 allows user-assisted remote…
CVE-2006-4326 — High (CVSS 7.5): Stack-based buffer overflow in Justsystem Ichitaro 9.x through 13.x, Ichitaro 2004, 2005, 2006, and Government 2006;…
CVE-2007-4246 — Medium (CVSS 6.8): Unspecified vulnerability, possibly a buffer overflow, in Justsystem Ichitaro 2007 and earlier allows remote attackers…
CVE-2006-6400 — Medium (CVSS 6.8): Buffer overflow in JustSystems Hanako 2004 through 2006, Hanako viewer 1.x, Ichitaro 2004, Ichitaro 2005, Ichitaro…
CVE-2006-5424 — Medium (CVSS 5.1): Unspecified vulnerability in Justsystem Ichitaro 2006, 2006 trial version, and Government 2006 allows remote attackers…

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