CVE-2026-76866 Netcore NR255-V - Command Injection

Netcore NR255-V firmware 1.5.130703 contains a command injection caused by unquoted user-supplied DDNS input in DDNSset_cgi.c and ddns_Proc.c, letting attackers execute root-run commands, exploit requires crafted DDNS input.

CVSS base score 7.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-88

Vendor fix

Update to the latest firmware version that fixes this issue.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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