Description
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.
Published: 2026-09-14
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Contec
Contec remote I/o Coupler Unit (server Type) Cpsn-mcb271-*
Vendors & Products Contec
Contec remote I/o Coupler Unit (server Type) Cpsn-mcb271-*

Tue, 15 Sep 2026 16:00:00 +0000

Type Values Removed Values Added
Title Missing Authentication in REST API Enables Remote Read/Control of I/O Coupler

Mon, 14 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Title Missing Authentication in REST API Enables Remote Read/Control of I/O Coupler

Mon, 14 Sep 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Sep 2026 07:00:00 +0000

Type Values Removed Values Added
Description 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.
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Contec Remote I/o Coupler Unit (server Type) Cpsn-mcb271-*
cve-icon MITRE

Status: PUBLISHED

Assigner: jpcert

Published:

Updated: 2026-09-14T11:19:47.275Z

Reserved: 2026-08-31T02:30:58.278Z

Link: CVE-2026-82784

cve-icon Vulnrichment

Updated: 2026-09-14T11:14:03.073Z

cve-icon NVD

Status : Deferred

Published: 2026-09-14T07:17:20.230

Modified: 2026-09-16T19:27:25.623

Link: CVE-2026-82784

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-17T19:45:58Z

Weaknesses