EUVD-2026-80039

| CVE-2026-76867 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-09-15 disclosure@vulncheck.com

GHSA-r4gj-cj22-7v4x

XSS

5.1

CVSS 4.0 · Vendor: vulncheck

Severity by source

Vendor (vulncheck) PRIMARY

5.1 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (vulncheck) · only source for this CVE.

CVSS VectorVendor: vulncheck

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

Sep 15, 2026 - 22:34 vuln.today

DescriptionCVE.org

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.

AnalysisAI

Stored cross-site scripting in the web management interface of the Netcore NR255-V router (firmware 1.5.130703) allows an attacker who already holds a valid management session to plant persistent JavaScript on routing and NAT configuration pages; the payload then executes in the browser of any user who later opens those pages, including higher-privileged administrators. The flaw sits in four CGI handlers (routing_tab_add_cgi, routing_table_list_show_cgi, route_policy_add_cgi, route_policy_parame_show_cgi) that fail to sanitise or encode route/NAT parameters before rendering them. …