---
id: CVE-2026-76856
title: >-
  Netcore NR255-V firmware version 1.5.130703 contains a cross-site request
  forgery vulnerability affecting the wan_config_set_cgi, wan_num_set_cgi, and
  lan_ip_change_cgi endpoints
summary: >-
  Netcore NR255-V firmware version 1.5.130703 contains a cross-site request
  forgery vulnerability affecting the wan_config_set_cgi, wan_num_set_cgi, and
  lan_ip_change_cgi endpoints. Attackers can craft forged requests to trick
  authenticate…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H'
cwe:
  - CWE-352
vendor: Netcore
product: NR255-V
affected:
  - NR255-V 1.5.130703
published: '2026-09-15'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T19:17:10.410'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76856'
references:
  - url: >-
      https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-csrf-wan-reconfig.md
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-cross-site-request-forgery-in-wan-lan-configuration-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.0019
epssPercentile: 0.07663
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T18:19:44.690772Z'
ingestedAt: '2026-09-15T22:45:31.286Z'
---

## Overview

Netcore NR255-V firmware version 1.5.130703 contains a cross-site request forgery vulnerability affecting the wan_config_set_cgi, wan_num_set_cgi, and lan_ip_change_cgi endpoints. Attackers can craft forged requests to trick authenticated administrators into modifying WAN or LAN network configuration settings without consent.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.