High severity7.8NVD Advisory· Published Mar 6, 2023· Updated Jun 17, 2026
CVE-2023-22421
CVE-2023-22421
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.
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Affected products
2- Range: <=1.6.9.0
- JTEKT ELECTRONICS CORPORATION/Kostac PLC Programming Software (Former name: Koyo PLC Programming Software)v5Range: Version 1.6.9.0 and earlier
Patches
Vulnerability mechanics
References
3- jvn.jp/en/vu/JVNVU94966432/nvdThird Party Advisory
- www.electronics.jtekt.co.jp/en/topics/202303035258/nvdVendor Advisory
- www.electronics.jtekt.co.jp/jp/topics/2023030313639/nvdVendor Advisory
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