Is CVE-2026-82781 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-82781 being exploited in the wild.

How severe is CVE-2026-82781?

Medium severity, with a CVSS score of 5.4, published 14 September 2026.

Which products and versions are affected?

Contec CONPROSYS nano Series Programmable Remote I/O Coupler Unit CPSN-PCB271-S1-041 prior to 1.61; Contec CONPROSYS nano Series Remote I/O Coupler Unit (EtherNet/IP Adapter) CPSN-EOB471EI-[]1 prior to 1.02; Contec CONPROSYS nano Series Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* prior to 1.82.

Is there a fix for CVE-2026-82781?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-82781 attacked?

It is attacked over the network.

Am I affected by CVE-2026-82781?

Check whether you run Contec CONPROSYS nano Series Programmable Remote I/O Coupler Unit, Contec CONPROSYS nano Series Remote I/O Coupler Unit (EtherNet/IP Adapter) or Contec CONPROSYS nano Series Remote I/O Coupler Unit (Server Type) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-82781: Contec CONPROSYS nano Series cross-site scripting

CVE-2026-82781 · Severity: medium · CVSS 5.4 · Published 2026-09-14

CONPROSYS nano Series are industrial remote I/O coupler units used in manufacturing and automation environments. A cross-site scripting (XSS) vulnerability allows an attacker to inject arbitrary scripts that execute in the web browser of an authenticated user, potentially compromising operator sessions and enabling unauthorized control of industrial equipment or data theft.

Vendors: Contec.

Quick answers

Is CVE-2026-82781 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-82781 being exploited in the wild.
How severe is CVE-2026-82781?: Medium severity, with a CVSS score of 5.4, published 14 September 2026.
Which products and versions are affected?: Contec CONPROSYS nano Series Programmable Remote I/O Coupler Unit CPSN-PCB271-S1-041 prior to 1.61; Contec CONPROSYS nano Series Remote I/O Coupler Unit (EtherNet/IP Adapter) CPSN-EOB471EI-[]1 prior to 1.02; Contec CONPROSYS nano Series Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* prior to 1.82.
Is there a fix for CVE-2026-82781?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-82781 attacked?: It is attacked over the network.
Am I affected by CVE-2026-82781?: Check whether you run Contec CONPROSYS nano Series Programmable Remote I/O Coupler Unit, Contec CONPROSYS nano Series Remote I/O Coupler Unit (EtherNet/IP Adapter) or Contec CONPROSYS nano Series Remote I/O Coupler Unit (Server Type) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is a stored or reflected cross-site scripting (CWE-79) vulnerability in the CONPROSYS nano Series web interface. The vulnerability requires user interaction (a logged-in user must view a crafted page) and authentication credentials, but operates over the network with low attack complexity. An attacker can inject malicious scripts that execute in the context of a logged-in user's session, allowing session hijacking, credential theft, or manipulation of industrial operations. Affected versions include CPSN-MCB271-* prior to 1.82, CPSN-EOB471EI-[]1 prior to 1.02, and CPSN-PCB271-S1-041 prior to 1.61. Patches are available in the specified patched versions.

Affected products

Contec CONPROSYS nano Series Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* prior to 1.82
Contec CONPROSYS nano Series Remote I/O Coupler Unit (EtherNet/IP Adapter) CPSN-EOB471EI-[]1 prior to 1.02
Contec CONPROSYS nano Series Programmable Remote I/O Coupler Unit CPSN-PCB271-S1-041 prior to 1.61

Timeline

2026-09-10: disclosed
2026-09-14: advisory

References

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