CVE-2026-82790 Cross-site scripting in PC-HELPER Wireless I/O DIO-0404RY-LWF
Cross-site scripting allows arbitrary script execution in a logged-in user's browser on Contec PC-HELPER Wireless I/O modules.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82790?
CVE-2026-82790 is a medium-severity cross-site scripting vulnerability in Contec Co., Ltd. PC-HELPER Wireless I/O DIO-0404RY-LWF, published on 14 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Cross-site scripting vulnerability exists in PC-HELPER Wireless I/O DIO-0404RY-LWF and PC-HELPER Wireless I/O DIO-0404RY-LWF-US. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.
Weakness: CWE-79
Which versions are affected by CVE-2026-82790?
How do I fix CVE-2026-82790?
No fix has been published for CVE-2026-82790 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-82790 being exploited?
There is no known exploitation of CVE-2026-82790 in the wild and no public exploit code.
Sources
Also known as GHSA-4p6h-654m-8phx.