CVE-2026-76866

Netcore NR255-V firmware version 1.5.130703 builds root-run command lines from unquoted user-supplied DDNS input in DDNSset_cgi.c and related ddns_Proc.c components, enabling os command argument injection. Attackers can exploit the unsanitized parameters to inject additional command arguments executed with root privileges.

  • Published Sep 15, 2026
  • CVSS 8.6 high
  • 0.6% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-76866 at the National Vulnerability Database