Justsystem vendor intelligence

Justsystem Known Exploited Vulnerabilities

Track evidence-backed exploitation affecting Justsystem products, including the gap beyond CISA KEV, confidence assessments, sensor observations, and practical response context.

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Total KEVs: 5; Known exploited vulnerabilities affecting Justsystem products
In CISA KEV: 0; Records also listed in the official catalog
Beyond CISA KEV: 5; Additional exploited CVEs absent from CISA KEV
Sensor Observed: 0; Justsystem KEVs with sensor-observed exploitation activity

The catalog gap matters for Justsystem exposure

Five of the five exploited Justsystem CVEs tracked here are not in CISA KEV. Teams relying on the official catalog alone would miss 100% of this vendor portfolio.

0%
Covered by CISA: 100%
Beyond CISA: 1
Product families

Attested Justsystem CVEs

Search the exploited-vulnerability portfolio, then narrow it to official CISA coverage or the additional records KEV Intelligence tracks beyond the catalog.

How exploitation is verified

CVE / description	Product	Confidence	CISA KEV	Added
CVE-2011-1331 JustSystems Ichitaro 2005 through 2011, Ichitaro Government 6, Ichitaro Government 2006 through 2010, Ichitaro Portable, Ichitaro Pro, and Ichitaro...	Ichitaro	High	Beyond CISA	18 Jul 2011
CVE-2009-1054 Unspecified vulnerability in JustSystems Ichitaro 13, 2004 through 2008, Lite2, and Ichitaro viewer 5.1.5.0 and earlier allows remote attackers to...	Ichitaro	High	Beyond CISA	24 Mar 2009
CVE-2008-3919 Unspecified vulnerability in multiple JustSystems Ichitaro products allows remote attackers to execute arbitrary code via a crafted JTD document,...	Ichitaro	High	Beyond CISA	04 Sep 2008
CVE-2007-6436 Stack-based buffer overflow in JSGCI.DLL in JustSystems Ichitaro 2005, 2006, and 2007 allows user-assisted remote attackers to execute arbitrary...	Ichitaro	High	Beyond CISA	18 Dec 2007
CVE-2006-4326 Stack-based buffer overflow in Justsystem Ichitaro 9.x through 13.x, Ichitaro 2004, 2005, 2006, and Government 2006; Ichitaro for Linux; and...	Ichitaro	High	Beyond CISA	24 Aug 2006

Showing 5 of 5 Justsystem known exploited vulnerabilities.

Recurring weakness patterns

Restriction and control account for four mapped occurrences across this Justsystem KEV portfolio.

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CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-94

Improper Control of Generation of Code ('Code Injection')

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