# CVE-2026-82783

## Summary

- **CVE ID:** CVE-2026-82783
- **Severity:** MEDIUM
- **CVSS Score:** 4.2 (CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-256
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

Plaintext storage of a password issue exists in CONPROSYS nano Series . If this vulnerability is exploited, an attacker with physical access to the product may obtain credentials.

## Affected Products

- Contec Co., Ltd. — Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* (0)
- Contec Co., Ltd. — Remote I/O Coupler Unit (EtherNet/IP Adapter) CPSN-EOB471EI-[]1 (0)
- Contec Co., Ltd. — Programmable Remote I/O Coupler Unit (Software PLC Type) CPSN-PCB271-S1-041 (0)

## References

- [CNA](https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_cps_26091000_en.pdf)
- [CNA](https://jvn.jp/en/vu/JVNVU96551518/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 2.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._