PT-2026-3795 · Openplc · Openplc

Fellipe Oliveira · Published 2026-01-21 · Updated 2026-01-26 · CVE-2021-47770

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions OpenPLC version 3

Description The software contains an authenticated remote code execution issue. An attacker with valid credentials can inject malicious code through the hardware configuration interface. This allows for the upload of a custom hardware layer containing reverse shell code, which establishes a network connection to a specified IP and port, enabling remote command execution. The vulnerable interface is the hardware configuration interface. Attackers can upload a custom hardware layer with embedded reverse shell code. The reverse shell code establishes a network connection to a specified IP and port, enabling remote command execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2021-47770

Affected Products

Openplc

References · 6

• 🔥 https://exploit-db.com/exploits/49803 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47770 · Security Note
• https://github.com/thiagoralves/OpenPLC_v3 · Note
• https://vulncheck.com/advisories/openplc-remote-code-execution · Note
• https://twitter.com/cracbot/status/2015741573922013354 · Twitter Post
• https://openplcproject.com · Note