What’s Vulnerable › Vulnerabilities

CVE-2021-47770: OpenPLC 3 - Remote Code Execution

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-21 · updated 2026-06-17
• Weakness: CWE-94

Description

OpenPLC v3 contains an authenticated remote code execution vulnerability that allows attackers with valid credentials to inject malicious code through the hardware configuration interface. Attackers can upload a custom hardware layer with embedded reverse shell code that establishes a network connection to a specified IP and port, enabling remote command execution.

Affected products

• Autonomy OpenPLC: OpenPLC v3

References

• https://github.com/thiagoralves/OpenPLC_v3
• https://www.exploit-db.com/exploits/49803
• https://www.openplcproject.com/
• https://www.vulncheck.com/advisories/openplc-remote-code-execution

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