CVE-2026-76856

HIGH 8.1

Netcore NR255-V 1.5.130703 Cross-Site Request Forgery in WAN/LAN Configuration Endpoints

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-352
Vendor	netcore
Product	nr255-v
Published	Sep 15, 2026

Stay Ahead of the Next One

Get instant alerts for netcore nr255-v

Be the first to know when new high vulnerabilities affecting netcore nr255-v are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Affected Versions

Netcore / NR255-V

1.5.130703

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-csrf-wan-reconfig.md vulncheck.com: https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-cross-site-request-forgery-in-wan-lan-configuration-endpoints

Credits

Zhou Ao Yin Luxing Jiang Yuxuan Liu Xin @Nebusec