High severity · published Sep 15, 2026
CVE-2026-76856
Netcore NR255-V 1.5.130703 Cross-Site Request Forgery in WAN/LAN Configuration Endpoints
8.1
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NR
NR255-V · Netcore
1.5.130703 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76856
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-76856
github.com
https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-csrf-wan-reconfig.md
www.vulncheck.com
https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-cross-site-request-forgery-in-wan-lan-configuration-endpoints
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