Is CVE-2026-76858 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-76858?

CVE-2026-76858 has a CVSS v3 severity of MEDIUM (4.8).

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CVE-2026-76858

Description

Netcore NR255-V version 1.5.130703 contains a stored cross-site scripting vulnerability in ddns_wan_list_show.cgi caused by unsafe eval() handling of DDNS data. Attackers can inject malicious script through the DDNS configuration path, leading to persistent execution when the affected page is viewed.