RCE in Autonomy Openplc
CVE-2021-47770
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.001
Affected products
- Autonomy Openplc — versions OpenPLC v3
Weakness classification (CWE)
References
- ExploitDB-49803 (exploit)
- OpenPLC Project Official Homepage (product)
- OpenPLC v3 GitHub Repository (product)
- VulnCheck Advisory: OpenPLC 3 - Remote Code Execution (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47770?
- CVE-2021-47770 is a high-severity vulnerability in Autonomy Openplc, classified under Code Injection. CVSS score: 8.8/10. Published 2026-01-21.
- How severe is CVE-2021-47770?
- High severity. CVSS v3 base score is 8.8 out of 10.