CVE-2026-76856 Netcore NR255-V - Cross-Site Request Forgery

Netcore NR255-V firmware version 1.5.130703 contains a cross-site request forgery caused by lack of proper request validation in wan_config_set_cgi, wan_num_set_cgi, and lan_ip_change_cgi endpoints, letting attackers trick authenticated administrators into modifying WAN or LAN network configurations without consent, exploit requires administrator authentication.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Cross-Site Request Forgery
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-352

Vendor fix

Update to the latest firmware version that patches this vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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