CVE-2026-76867 Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting in Route/NAT Configuration CGI Handlers
Attackers can inject persistent scripts into Netcore NR255-V router configuration pages, allowing execution in the context of viewing users.
- 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-2026-76867?
CVE-2026-76867 is a medium-severity cross-site scripting vulnerability in Netcore NR255-V, published on 15 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
Netcore NR255-V firmware version 1.5.130703 contains a stored cross-site scripting vulnerability in routing and NAT configuration CGI components including routing_tab_add_cgi, routing_table_list_show_cgi, route_policy_add_cgi, and route_policy_parame_show_cgi. Attackers can inject persistent script payloads through these route and NAT configuration pages, which are then executed in the context of users viewing the affected pages.
Weakness: CWE-79
Which versions are affected by CVE-2026-76867?
How do I fix CVE-2026-76867?
No fix has been published for CVE-2026-76867 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-2026-76867 being exploited?
There is no known exploitation of CVE-2026-76867 in the wild and no public exploit code.
Sources
Also known as GHSA-r4gj-cj22-7v4x.