What’s Vulnerable › Vulnerabilities
CVE-2018-20818
- Severity: critical (CVSS 9.8 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-04-22 · updated 2026-06-17
- Weakness: CWE-119
Description
A buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLC_v2 and OpenPLC_v3 versions. It occurs in the modbus.cpp mapUnusedIO() function, which can cause a runtime crash of the PLC or possibly have unspecified other impact.
Affected products
- openplcproject Openplc V2 Firmware: all versions
- OpenPLC_v3: all versions
References
Get alerted when CVE-2018-20818 or the next vulnerability affects your stack