Auth bypass in Contec Co., Ltd. Remote I/o Coupler Unit (Server Type) Cpsn-Mcb271-*
CVE-2026-82784
Missing authentication for critical function vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. An attacker may execute a REST API without authentication, which could allow the attacker to retrieve I/O values and/or control the output.
Vulnerability class: Broken Authentication
EPSS: 0.002 (10.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-82784?
- CVE-2026-82784 is a medium-severity vulnerability in Contec Co., Ltd. Remote I/o Coupler Unit (Server Type) Cpsn-Mcb271-*, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-09-14.
- How severe is CVE-2026-82784?
- Medium severity. CVSS v3 base score is 6.5 out of 10.