CVE-2026-28205

Received Received - Intake

Insecure Default Initialization in OpenPLC_V3 Enables Authentication Bypass

Publication date: 2026-04-09

Last updated on: 2026-04-28

Assigner: ICS-CERT

Description

OpenPLC_V3 is vulnerable to an Initialization of a Resource with an Insecure Default vulnerability which could allow an attacker to gain access to the system by bypassing authentication via an API.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-09

Last Modified

2026-04-28

Generated

2026-07-06

AI Q&A

2026-04-09

EPSS Evaluated

2026-07-05

NVD

CVE-2026-28205

EUVD

EUVD-2026-21009

Affected Vendors & Products

Vendor	Product	Version / Range
openplcproject	openplc_v3_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1188	The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.

Attack-Flow Graph

Executive Summary

The vulnerability in OpenPLC_V3 is an Initialization of a Resource with an Insecure Default. This means that the system is set up with insecure default settings that allow an attacker to bypass authentication mechanisms.

Specifically, an attacker could exploit this weakness via an API to gain unauthorized access to the system.

Impact Analysis

This vulnerability can have a severe impact because it allows an attacker to bypass authentication and gain unauthorized access to the system.

Such unauthorized access could lead to control or manipulation of the system, potentially causing operational disruptions or exposing sensitive information.

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