CVE-2026-28205 PUBLISHED

Initialization of a resource with an insecure default in OpenPLC_V3

Assigner: icscert
Reserved: 06.04.2026 Published: 09.04.2026 Updated: 09.04.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	Low
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	OpenPLC_V3
Product	OpenPLC_V3
Versions	Default: unaffected Version All versions is affected

Workarounds

OpenPLC_v3 is now considered to be end of life. Users are recommended to upgrade to OpenPLC Runtime v4 ( https://github.com/autonomy-logic/openplc-runtime ).

Credits

Shriyans Sudhi (ss0x00) from Rochester Institute of Technology (RIT) finder

References

https://www.cisa.gov/news-events/ics-advisories/icsa-25-345-10

Problem Types

CWE-1188 Initialization of a resource with an insecure default CWE