CVE-2023-22660: Justsystems Ichitaro 2022

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Justsystems Ichitaro 2022: version 1.0.1.57600 only

Published 2023-04-05. Last modified 2026-06-17.