CVE-2022-43664: Justsystems Ichitaro 2022

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

A use-after-free vulnerability exists within the way Ichitaro Word Processor 2022, version 1.0.1.57600, processes protected documents. A specially crafted document can trigger reuse of freed memory, which can lead to further memory corruption and potentially result in arbitrary code execution. An attacker can provide a malicious document to trigger this vulnerability.

Affected products

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