High severity8.8NVD Advisory· Published Sep 15, 2026

CVE-2026-76861

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Netcore/NR255-Vllm-fuzzy
Range: 1.5.130703
Draw Ctf/Netcore Router Public Refsllm-fuzzy
Range: 1.5.130703

Patches

Vulnerability mechanics

References

github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-tcpdump-overflow.mdnvd
www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-stack-based-buffer-overflow-in-ntools-tcpdump-start-set-cginvd

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