---
id: CVE-2026-82781
title: Cross-site scripting vulnerability exists in CONPROSYS nano Series
summary: >-
  Cross-site scripting vulnerability exists in CONPROSYS nano Series. If this
  vulnerability is exploited, an arbitrary script may be executed on a logged-in
  user's web browser.
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
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-2026-82781'
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: 0.00237
epssPercentile: 0.13147
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T11:06:25.950382Z'
ingestedAt: '2026-09-14T15:23:07.462Z'
---

## Overview

Cross-site scripting vulnerability exists in CONPROSYS nano Series. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.

## Remediation

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