CVE-2026-76866

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

State: Published
Severity: 8.6 High
Published: Sep 15, 2026
Updated: Sep 21, 2026
Reserved: Aug 19, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	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	VulnCheck
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Affected Products

Product	Versions
NR255-VNetcore	1.5.130703Affected

References

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

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