CVE-2026-76866 HIGH

CVE-2026-76866: Netcore NR255-V 1.5.130703 OS Command Argument Injection via Unquoted DDNS Parameters

Vendor Netcore
Product NR255-V
Weakness CWE-88
Published September 15, 2026
Last update September 15, 2026
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 15, 2026 CVE published