CVE-2026-82784NVD

Vulnerability Summary

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.

Severity Level

MEDIUM(6.5)

Published Date

Sep 14, 2026

Last Modified

Sep 14, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.20%Probability

Root Weakness (CWE)

CWE-306: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v4.0 Base Metrics — Score 6.9 (MEDIUM)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)Low

Integrity (Vulnerable System)Low

Availability (Vulnerable System)None

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

CVSS v3.1 Base Metrics — Score 6.5 (MEDIUM)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

ConfidentialityLow

IntegrityLow

AvailabilityNone

Affected & Patched Versions

Affected Versions

Contec Co., Ltd. Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* < 1.82

Patched Versions

Contec Co., Ltd. Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* 1.82

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