CVE-2021-47770

OpenPLC 3 - Remote Code Execution

Published Jan 21, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:h:openplcproject:openplc_v3:openplc:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Openplcproject
Openplcproject openplc
Openplcproject openplc V3
Vendors & Products Openplcproject
Openplcproject openplc
Openplcproject openplc V3
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title OpenPLC 3 - Remote Code Execution
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Aug 14, 2026, 4:49 PM
Reserved
Jan 14, 2026, 2:39 PM
Status
Deferred
Published
Jan 21, 2026, 6:16 PM
Modified
Jun 17, 2026, 4:18 AM