CVE-2026-76861

Netcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in ntools_tcpdump_start_set.cgi

State: Published
Severity: 8.7 High
Published: Sep 15, 2026
Updated: Sep 21, 2026
Reserved: Aug 19, 2026

Description

Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in ntools_tcpdump_start_set.cgi caused by an unsized sprintf call when processing form values. An attacker can submit crafted input to this cgi endpoint to overflow the stack buffer and potentially execute arbitrary code.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
NR255-VNetcore	1.5.130703Affected

References

Netcore router public references: Stack-based Buffer Overflow in ntools_tcpdump_start_set.cgi via Unsized sprintfthird-party-advisory
VulnCheck Advisory: Netcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in ntools_tcpdump_start_set.cgithird-party-advisory

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