CVE-2026-108929

Summary

A critical argument injection vulnerability exists in Netcore NR268 router's DDNS component that allows remote attackers to execute arbitrary commands with high privileges. This flaw enables attackers to manipulate the Hostname parameter in the execvp function, potentially leading to complete system compromise.

Exploitability

Exploitation is relatively straightforward as it requires only a remote HTTP request to the vulnerable DDNSset.cgi endpoint with a crafted Hostname parameter, with no additional authentication needed for the initial attack vector.

Blast radius

If exploited, this vulnerability could allow attackers to gain full administrative control over affected routers, potentially enabling them to redirect traffic, install malware, or use the devices as launch points for broader network attacks.

Detection

Monitor for unusual HTTP requests to /router/DDNSset.cgi with suspicious Hostname parameter values that contain shell metacharacters or command chaining sequences, particularly those showing up in web server access logs.

Prioritized remediation

Upgrade to firmware version 1.7.121109 or later, as this is the specific fixed version mentioned in the CVE description.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.