Is CVE-2026-82773 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-82773 being exploited in the wild.

How severe is CVE-2026-82773?

Medium severity, with a CVSS score of 6.1, published 14 September 2026.

Which products and versions are affected?

Contec CONPROSYS M2M Controller Series CPS-MC341 and CPS-MCS341* prior to 4.1.0; Contec CONPROSYS M2M Gateway Series CPS-MG341* and CPS-MGS341* prior to 4.1.0.

Is there a fix for CVE-2026-82773?

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-2026-82773 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-82773?

Check whether you run Contec CONPROSYS M2M Controller Series or Contec CONPROSYS M2M Gateway Series 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-2026-82773: Contec CONPROSYS M2M Gateway cross-site scripting

CVE-2026-82773 · Severity: medium · CVSS 6.1 · Published 2026-09-14

Contec CONPROSYS M2M Gateway and M2M Controller Series are industrial automation devices used for machine-to-machine communication and data collection in manufacturing and IoT environments. A cross-site scripting (XSS) vulnerability allows an attacker to inject malicious scripts that execute in the browser of any logged-in user, potentially leading to unauthorized actions, data theft, or credential compromise within the industrial network.

Vendors: Contec.

Quick answers

Is CVE-2026-82773 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-82773 being exploited in the wild.
How severe is CVE-2026-82773?: Medium severity, with a CVSS score of 6.1, published 14 September 2026.
Which products and versions are affected?: Contec CONPROSYS M2M Controller Series CPS-MC341 and CPS-MCS341* prior to 4.1.0; Contec CONPROSYS M2M Gateway Series CPS-MG341* and CPS-MGS341* prior to 4.1.0.
Is there a fix for CVE-2026-82773?: 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-2026-82773 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-82773?: Check whether you run Contec CONPROSYS M2M Controller Series or Contec CONPROSYS M2M Gateway Series 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

The vulnerability is a reflected or stored cross-site scripting (CWE-79) flaw in the CONPROSYS M2M Gateway Series (CPS-MG341* and CPS-MGS341* versions prior to 4.1.0) and M2M Controller Series (CPS-MC341 and CPS-MCS341* versions prior to 4.1.0). The attack requires user interaction—a logged-in user must view a malicious page or click a crafted link. An attacker can execute arbitrary JavaScript in the victim's browser context, potentially stealing session tokens, performing unauthorized operations, or redirecting to phishing sites. The vulnerability is remotely exploitable over the network without authentication to the device itself. Patches are available in version 4.1.0 and later.

Affected products

Contec CONPROSYS M2M Gateway Series CPS-MG341* and CPS-MGS341* prior to 4.1.0
Contec CONPROSYS M2M Controller Series CPS-MC341 and CPS-MCS341* prior to 4.1.0

Timeline

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

References

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