CVE-2021-47770

OpenPLC 3 - Remote Code Execution

CVSS 8.6 HIGHEPSS 0.6%CWE-94

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.6EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Autonomy · OpenPLC

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