How severe is CVE-2017-2790?

CVE-2017-2790 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-2790 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-2790?

CVE-2017-2790 affects Justsystems Ichitaro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-2790?

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

When was CVE-2017-2790 published?

CVE-2017-2790 was published on 2017-02-24 and last updated on 2026-06-17.

CVE-2017-2790

CVE-2017-2790 is a high-severity vulnerability in Justsystems Ichitaro with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Justsystems Ichitaro
Published: 2017-02-24
Last modified: 2026-06-17

Description

When processing a record type of 0x3c from a Workbook stream from an Excel file (.xls), JustSystems Ichitaro Office trusts that the size is greater than zero, subtracts one from the length, and uses this result as the size for a memcpy. This results in a heap-based buffer overflow and can lead to code execution under the context of the application.

Frequently asked questions

What is CVE-2017-2790?: When processing a record type of 0x3c from a Workbook stream from an Excel file (.xls), JustSystems Ichitaro Office trusts that the size is greater than zero, subtracts one from the length, and uses this result as the size for a memcpy. This results in a heap-based buffer overflow and can lead to code execution under the context of the application.
How severe is CVE-2017-2790?: CVE-2017-2790 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-2790 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-2790?: CVE-2017-2790 affects Justsystems Ichitaro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-2790?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-2790 published?: CVE-2017-2790 was published on 2017-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:justsystems:ichitaro:*:*:*:*:*:*:*:*

More vulnerabilities in Justsystems Ichitaro

CVE-2014-7247 — Critical (CVSS 10.0): Unspecified vulnerability in JustSystems Ichitaro 2008 through 2011; Ichitaro Government 6, 7, 2008, 2009, and 2010;…
CVE-2013-3644 — Critical (CVSS 10.0): Unspecified vulnerability in JustSystems Ichitaro 2006 through 2013; Ichitaro Pro through 2; Ichitaro Government 6, 7,…
CVE-2013-5990 — Critical (CVSS 9.3): Unspecified vulnerability in JustSystems Ichitaro 2006 through 2011; Ichitaro Government 6, 7, and 2006 through 2010;…
CVE-2013-0707 — Critical (CVSS 9.3): Unspecified vulnerability in JustSystems Ichitaro 2006 and 2007, Ichitaro Government 2006 and 2007, Ichitaro Portable…
CVE-2012-0269 — Critical (CVSS 9.3): Buffer overflow in JustSystems Ichitaro 2011 Sou, Ichitaro 2006 through 2011, Ichitaro Government 2006 through 2010,…
CVE-2011-1331 — Critical (CVSS 9.3): JustSystems Ichitaro 2005 through 2011, Ichitaro Government 6, Ichitaro Government 2006 through 2010, Ichitaro…

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