CVE-2018-20818
9.8 · CRITICALOverview
CVE-2018-20818 is a critical-severity vulnerability affecting openplcproject openplc_v2_firmware. It was published on April 22, 2019 and has a CVSS 3.0 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from openplcproject. Update openplc_v2_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
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Frequently Asked Questions
What is CVE-2018-20818?
CVE-2018-20818 is a critical-severity vulnerability affecting openplcproject openplc_v2_firmware. It was published on April 22, 2019 and has a CVSS 3.0 base score of 9.8 (CRITICAL).
How severe is CVE-2018-20818?
This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-20818?
Check the references section for vendor advisories and patches from openplcproject. Update openplc_v2_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-20818?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-20818 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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