---
id: CVE-2026-76869
title: >-
  Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in
  reboot_timer_set.cgi caused by improper sscanf token parsing
summary: >-
  Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in
  reboot_timer_set.cgi caused by improper sscanf token parsing. Attackers can
  exploit this flaw by submitting crafted input to the affected endpoint to
  corrupt st…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
vendor: Netcore
product: NR255-V
affected:
  - NR255-V 1.5.130703
published: '2026-09-15'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T20:18:16.037'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76869'
references:
  - url: >-
      https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-reboot-timer-overflow.md
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-stack-based-buffer-overflow-in-reboot-timer-set-cgi
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T18:57:16.870497Z'
epss: 0.00433
epssPercentile: 0.36967
ingestedAt: '2026-09-15T22:45:31.291Z'
---

## Overview

Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in reboot_timer_set.cgi caused by improper sscanf token parsing. Attackers can exploit this flaw by submitting crafted input to the affected endpoint to corrupt stack memory.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.