How severe is CVE-2023-22660?

CVE-2023-22660 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-22660 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22660?

CVE-2023-22660 affects Justsystems Ichitaro 2022. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-22660?

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-2023-22660 published?

CVE-2023-22660 was published on 2023-04-05 and last updated on 2026-06-17.

CVE-2023-22660

CVE-2023-22660 is a high-severity vulnerability in Justsystems Ichitaro 2022 with a CVSS 3.x base score of 7.0. 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Justsystems Ichitaro 2022
Published: 2023-04-05
Last modified: 2026-06-17

Description

A heap-based buffer overflow vulnerability exists in the way Ichitaro version 2022 1.0.1.57600 processes certain LayoutBox stream record types. A specially crafted document can cause a buffer overflow, leading to memory corruption, which can result in arbitrary code execution.To trigger this vulnerability, the victim would need to open a malicious, attacker-created document.

Frequently asked questions

What is CVE-2023-22660?: A heap-based buffer overflow vulnerability exists in the way Ichitaro version 2022 1.0.1.57600 processes certain LayoutBox stream record types. A specially crafted document can cause a buffer overflow, leading to memory corruption, which can result in arbitrary code execution.To trigger this vulnerability, the victim would need to open a malicious, attacker-created document.
How severe is CVE-2023-22660?: CVE-2023-22660 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-22660 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22660?: CVE-2023-22660 affects Justsystems Ichitaro 2022. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-22660?: 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-2023-22660 published?: CVE-2023-22660 was published on 2023-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:justsystems:ichitaro_2022:1.0.1.57600:*:*:*:*:*:*:*

More vulnerabilities in Justsystems Ichitaro 2022

CVE-2023-38128 — High (CVSS 7.8): An out-of-bounds write vulnerability exists in the "HyperLinkFrame" stream parser of Ichitaro 2023 1.0.1.59372. A…
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CVE-2023-34366 — High (CVSS 7.8): A use-after-free vulnerability exists in the Figure stream parsing functionality of Ichitaro 2023 1.0.1.59372. A…
CVE-2023-35126 — High (CVSS 7.8): An out-of-bounds write vulnerability exists within the parsers for both the "DocumentViewStyles" and…
CVE-2022-45115 — High (CVSS 7.8): A buffer overflow vulnerability exists in the Attribute Arena functionality of Ichitaro 2022 1.0.1.57600. A specially…
CVE-2022-43664 — High (CVSS 7.8): A use-after-free vulnerability exists within the way Ichitaro Word Processor 2022, version 1.0.1.57600, processes…

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