Vulnerability · Published Sep 14, 2026 · Assigned by jpcert
CVE-2026-82781
Medium 5.4
In plain English
A medium-severity cross-site scripting in Programmable Remote I/O Coupler Unit (Software PLC Type) CPSN-PCB271-S1-041 from Contec Co., Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 85.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Contec Co., Ltd. | Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* | 0 – before 1.82 |
| Contec Co., Ltd. | Remote I/O Coupler Unit (EtherNet/IP Adapter) CPSN-EOB471EI-[]1 | 0 – before 1.02 |
| Contec Co., Ltd. | Programmable Remote I/O Coupler Unit (Software PLC Type) CPSN-PCB271-S1-041 | 0 – before 1.61 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N