---
id: CVE-2026-82783
title: 'Plaintext storage of a password issue exists in CONPROSYS nano Series '
summary: >-
  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.
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-256
vendor: 'Contec Co., Ltd.'
product: Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*
affected:
  - remote_i_o_coupler_unit_server_type_cpsn-mcb271- < 1.82
  - remote_i_o_coupler_unit_ethernet_ip_adapter_cpsn-eob471ei-_1 < 1.02
  - >-
    programmable_remote_i_o_coupler_unit_software_plc_type_cpsn-pcb271-s1-041 <
    1.61
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:27:25.623'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82783'
references:
  - url: 'https://jvn.jp/en/vu/JVNVU96551518/'
    label: vultures@jpcert.or.jp
  - url: >-
      https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_cps_26091000_en.pdf
    label: vultures@jpcert.or.jp
tags:
  - nvd
  - cve.org
epss: 0.00175
epssPercentile: 0.06172
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T11:06:08.202556Z'
ingestedAt: '2026-09-14T15:23:07.462Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.