CVE-2023-22421

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-06 · updated 2026-06-17
Weakness: CWE-125

Description

Out-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and earlier. The insufficient buffer size for the PLC program instructions leads to out-of-bounds read. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

Affected products

JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software (Former name: Koyo PLC Programming Software): through 1.6.9.0

References

https://jvn.jp/en/vu/JVNVU94966432/
https://www.electronics.jtekt.co.jp/en/topics/202303035258/
https://www.electronics.jtekt.co.jp/jp/topics/2023030313639/
https://jvn.jp/en/vu/JVNVU94966432/
https://www.electronics.jtekt.co.jp/en/topics/202303035258/
https://www.electronics.jtekt.co.jp/jp/topics/2023030313639/

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