CVE-2026-76861 Netcore NR255-V - Buffer Overflow

Netcore NR255-V 1.5.130703 contains a stack-based buffer overflow caused by an unsized sprintf call in ntools_tcpdump_start_set.cgi, letting attackers execute arbitrary code remotely, exploit requires crafted input to the CGI endpoint.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.68% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to the latest version.

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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