CVE-2013-5990: Unspecified vulnerability in JustSystems Ichitaro 2006 through 2011; Ichitaro Government 6, 7, and 2006 throug

This month

HIGH 9.3DOWNGRADEMITIGATEDOWNGRADE

CVE-2013-5990 is a high-severity flaw (CVSS 9.3) affecting ichitaro pro, ichitaro portable with oreplug, ichitaro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in JustSystems Ichitaro 2006 through 2011; Ichitaro Government 6, 7, and 2006 through 2010; Ichitaro 2011 Sou; Ichitaro 2012 Shou; Ichitaro 2013 Gen and Gen Trial Edition; Ichitaro Pro; Ichitaro Pro 2 and Pro 2 Trial Edition; Ichitaro Viewer; and Ichitaro Portable with oreplug allows remote attackers to execute arbitrary code via a crafted document.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.3 (High)
EPSS exploit chance	4.6% (top 8%)
CISA exploited list	No
Published	2013-11-13
Last modified	2026-06-16

Publisher (CNA): JPCERT/CC · Vendor: justsystems

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-11-13 15:55 UTCPublished CVE record published
2026-06-16 23:59 UTCUpdated Record last modified

justsystems ichitaro pro DOWNGRADE

Affected: all versions · 2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2

1. Check installed version

apt-cache policy ichitaro-pro || rpm -q ichitaro-pro || ichitaro-pro --version

2. No fixed release: DOWNGRADE to a release before 2 (Debian / Ubuntu)

apt-cache madison ichitaro-pro sudo apt install ichitaro-pro=<VERSION_BEFORE_2> sudo apt-mark hold ichitaro-pro

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ichitaro-pro sudo dnf downgrade ichitaro-pro-<VERSION_BEFORE_2> sudo dnf versionlock add ichitaro-pro

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

justsystems ichitaro portable with oreplug MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ichitaro-portable-with-oreplug || rpm -q ichitaro-portable-with-oreplug || ichitaro-portable-with-oreplug --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

justsystems ichitaro DOWNGRADE

Affected: 2012 · 2013 · 2011 · 6 · 7 · 2006 · 2007 · 2008

Fixed in: no fixed release known

Safe to downgrade to: a release before 6

1. Check installed version

apt-cache policy ichitaro || rpm -q ichitaro || ichitaro --version

2. No fixed release: DOWNGRADE to a release before 6 (Debian / Ubuntu)

apt-cache madison ichitaro sudo apt install ichitaro=<VERSION_BEFORE_6> sudo apt-mark hold ichitaro

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ichitaro sudo dnf downgrade ichitaro-<VERSION_BEFORE_6> sudo dnf versionlock add ichitaro

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

justsystems ichitaro viewer MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ichitaro-viewer || rpm -q ichitaro-viewer || ichitaro-viewer --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-5990?

ichitaro pro: downgrade or apply the listed mitigation; ichitaro portable with oreplug: mitigate or apply the listed mitigation; ichitaro: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-5990 being exploited?

CVE-2013-5990 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-5990 affect?

CVE-2013-5990 affects ichitaro pro, ichitaro portable with oreplug, ichitaro. Severity is high (CVSS 9.3). Unspecified vulnerability in JustSystems Ichitaro 2006 through 2011; Ichitaro Government 6, 7, and 2006 through 2010; Ichitaro 2011 Sou; Ichitaro 2012 Shou; Ichitaro 2013 Gen and Gen Trial Edition; Ichitaro Pro; Ichitaro Pro 2 and Pro 2 Tri

How urgent is CVE-2013-5990?

Priority 55/100. Critical severity; EPSS top 8%: very likely to be exploited

Related CVEs

CVE-2014-7247 HIGH 10.0 DOWNGRADE DOWNGRADE Unspecified vulnerability in JustSystems Ichitaro 2008 through 2011; Ichitaro Government 6, 7, 2008, 2009, and
CVE-2011-1331 HIGH 9.3 DOWNGRADE MITIGATE JustSystems Ichitaro 2005 through 2011, Ichitaro Government 6, Ichitaro Government 2006 through 2010, Ichitaro

References

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