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Vulnerability record · CVE-2026-76856 · published 15 September 2026

CVE-2026-76856: Cross-site request forgery vulnerability

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.

7.0 CVSS 4.0 High EPSS 0.19% · top 92.2% CWE-352 · Cross-site request forgery Deferred
7.0CVSS 4.0 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
21 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/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:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-76856), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.