CVE-2022-43664

Name: CVE-2022-43664
Creator: NVD / NIST
Published: 2023-04-05T16:15:07.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2022-43664 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

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.

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

0.53%

40.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

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-2022-1673Exploit, Third Party Advisory
https://jvn.jp/en/jp/JVN79149117/Third Party Advisory, VDB Entry
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1673Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1673

Timeline

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

Frequently Asked Questions

What is CVE-2022-43664?

How severe is CVE-2022-43664?

CVE-2022-43664 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2022-43664?

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-2022-43664?

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

Scan your code now

Source: NVD / NIST