CVE-2026-76866: high-severity vulnerability in Netcore NR255-V
Netcore NR255-V 1.5.130703 OS Command Argument Injection via Unquoted DDNS Parameters
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.6%
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:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
Netcore · NR255-VRelated CVEs — Netcore NR255-V
In the same product, most dangerous first.
CVE-2026-76861HIGHNetcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in ntools_tcpdump_start_set.cgiEPSS 0.7%CVE-2026-76869HIGHNetcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in reboot_timer_set.cgiEPSS 0.6%CVE-2026-76862HIGHNetcore NR255-V 1.5.130703 OS Command Argument Injection in Nettools tcpdump Launch PathsEPSS 0.5%CVE-2026-76860HIGHNetcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in wake_up_set.cgi via MAC and ID TokenizationEPSS 0.5%CVE-2026-76868MEDIUMNetcore NR255-V 1.5.130703 NULL Pointer Dereference in route_policy_add.cgi via Missing exit_portEPSS 0.5%CVE-2026-76865MEDIUMNetcore NR255-V 1.5.130703 NULL Pointer Dereference via Unchecked atoi() in QoS Setter HandlersEPSS 0.5%