What is CVE-2026-76866?

CVE-2026-76866 is a high-severity vulnerability in Netcore Nr255-V, classified under Argument Injection. CVSS score: 7.2/10. Published 2026-09-15.

How severe is CVE-2026-76866?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Netcore Nr255-V

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.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Netcore Nr255-v — versions 1.5.130703

Weakness classification (CWE)

CWE-88 — Argument Injection

References

disclosure@vulncheck.com (third-party-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-76866?: CVE-2026-76866 is a high-severity vulnerability in Netcore Nr255-V, classified under Argument Injection. CVSS score: 7.2/10. Published 2026-09-15.
How severe is CVE-2026-76866?: High severity. CVSS v3 base score is 7.2 out of 10.