Out-of-bounds read in JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software
Priority LOW 36CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00318 24th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| JTEKT ELECTRONICS CORPORATION | Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) | up to 1.6.9.0 | — | No fix listed | CNA |
- Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) VendorJTEKT ELECTRONICS CORPORATION Affected up to 1.6.9.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jtekt:kostac_plc_programming_software:*:*:*:*:*:*:*:* | up to 1.6.9.0 | Vulnerable | JTEKT ELECTRONICS CORPORATION |
- cpe:2.3:a:jtekt:kostac_plc_programming_software:*:*:*:*:*:*:*:* Versions up to 1.6.9.0 Vulnerable ·JTEKT ELECTRONICS CORPORATION
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-22421
- 2026-10-03 Alias added: GHSA-773f-mh54-2mhm
References
More JTEKT ELECTRONICS CORPORATION Kostac Plc Programming Software vulnerabilities
- TI-2023-08682 Use after free in JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software CVSS 3.1HIGH 7.8
- TI-2023-08679 Out-of-bounds read in JTEKT ELECTRONICS CORPORATION Kostac PLC Programming Software CVSS 3.1HIGH 7.8
Sources
- CVE-2023-22421 · CVE Program
- CVE-2023-22421 · NVD
- FIRST EPSS
- GHSA-773f-mh54-2mhm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences