What is CVE-2026-76856?

CVE-2026-76856 is a high-severity vulnerability in Netcore Nr255-V, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.1/10. Published 2026-09-15.

How severe is CVE-2026-76856?

High severity. CVSS v3 base score is 8.1 out of 10.

CSRF in Netcore Nr255-V

CVE-2026-76856

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.

Vulnerability class: CSRF (Cross-Site Request Forgery)

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.

Affected products

Netcore Nr255-v — versions 1.5.130703

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

disclosure@vulncheck.com (third-party-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-76856?: CVE-2026-76856 is a high-severity vulnerability in Netcore Nr255-V, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.1/10. Published 2026-09-15.
How severe is CVE-2026-76856?: High severity. CVSS v3 base score is 8.1 out of 10.