Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

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

High 7.2

In plain English

A high-severity argument injection in NR255-V from Netcore. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.6%top 52.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Netcore	NR255-V	1.5.130703

Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

Netcore router public references: DDNS Management Builds Root-run Command Lines from Unquoted User Input third-party-advisory
VulnCheck Advisory: Netcore NR255-V 1.5.130703 OS Command Argument Injection via Unquoted DDNS Parameters third-party-advisory