CVE-2026-76856 Netcore NR255-V 1.5.130703 Cross-Site Request Forgery in WAN/LAN Configuration Endpoints
Attackers can trick authenticated administrators into modifying WAN or LAN network settings via forged requests on Netcore NR255-V routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-76856?
CVE-2026-76856 is a high-severity vulnerability in Netcore NR255-V, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-352
Which versions are affected by CVE-2026-76856?
How do I fix CVE-2026-76856?
No fix has been published for CVE-2026-76856 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76856 being exploited?
There is no known exploitation of CVE-2026-76856 in the wild and no public exploit code.
Sources
Also known as GHSA-69qw-j4gf-89pq.