CVE-2023-22660

Name: CVE-2023-22660
Creator: NVD / NIST
Published: 2023-04-05T16:15:07.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2023-22660 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.54%

41.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-122

Affected Software

Vendor	Product	Versions
Justsystems	Ichitaro 2022	1.0.1.57600

References

https://jvn.jp/en/jp/JVN79149117/Third Party Advisory, VDB Entry
https://talosintelligence.com/vulnerability_reports/TALOS-2023-1722Exploit, Third Party Advisory
https://jvn.jp/en/jp/JVN79149117/Third Party Advisory, VDB Entry
https://talosintelligence.com/vulnerability_reports/TALOS-2023-1722Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1722

Timeline

Published: Apr 5, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-22660?

How severe is CVE-2023-22660?

CVE-2023-22660 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2023-22660?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-22660?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST