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Vulnerabilities

Vulnerability · CVE-2013-3644

JustSystems Ichitaro/Ichitaro Pro/Government/Portable/Viewer/JUST School Unspecified Code Execution Vulnerability

Published May 1, 2020 · catalog updated May 1, 2020 · JustSystems Ichitaro/Ichitaro Pro/Government/Portable/Viewer/JUST School

Patch now

CVE-2013-3644 is in the CISA known-exploited catalog. Confirm JustSystems Ichitaro/Ichitaro Pro/Government/Portable/Viewer/JUST School against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (JustSystems Ichitaro/Ichitaro Pro/Government/Portable/Viewer/JUST School).
  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
4.17%
Remediation
Remediation guidance
Affected products
vendor justsystems ichitaro

Unspecified vulnerability in JustSystems Ichitaro 2006 through 2013; Ichitaro Pro through 2; Ichitaro Government 6, 7, and 2006 through 2010; Ichitaro Portable with oreplug; Ichitaro Viewer; and Ichitaro JUST School through 2010 allows remote attackers to execute arbitrary code via a crafted document.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor justsystems ichitaroversion unspecified

How to fix CVE-2013-3644

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2013-3644 is in the CISA known-exploited catalog. Confirm JustSystems Ichitaro/Ichitaro Pro/Government/Portable/Viewer/JUST School against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 4.17%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 1, 2020 · VulnCheck KEV

    Detected

    Unspecified vulnerability in JustSystems Ichitaro 2006 through 2013; Ichitaro Pro through 2; Ichitaro Government 6, 7, and 2006 through 2010; Ichitaro Portable with oreplug; Ichitaro Viewer; and Ichitaro JUST School through 2010 allows remote attackers to execute arbitrary code via a crafted document.

  2. May 1, 2020 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2013-3644

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2013-3644

    30-day exploitation probability 4.2%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2013-3644

    Unspecified vulnerability in JustSystems Ichitaro 2006 through 2013; Ichitaro Pro through 2; Ichitaro Government 6, 7, and 2006 through 2010; Ichitaro Portable with oreplug; Ichitaro Viewer; and Ichitaro JUST School through 2010 allows remote attackers to execute arbitrary code v

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.