---
id: CVE-2026-3823
title: >-
  EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer
  Overflow vulnerability, allowing unauthenticated remote attackers to control
  the program's execution flow and execute arbitrary code.
summary: >-
  EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer
  Overflow vulnerability, allowing unauthenticated remote attackers to control
  the program's execution flow and execute arbitrary code.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
  - CWE-787
vendor: blackbeartechhive
product: atop_ehg2408_firmware
affected:
  - atop_ehg2408_firmware < 3.36
  - atop_ehg2408-2sfp_firmware < 3.36
patched:
  - atop_ehg2408_firmware 3.36
  - atop_ehg2408-2sfp_firmware 3.36
published: '2026-03-09'
updated: '2026-07-07'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3823'
references:
  - url: 'https://www.twcert.org.tw/en/cp-139-10753-e091e-2.html'
    label: twcert@cert.org.tw
  - url: 'https://www.twcert.org.tw/tw/cp-132-10752-5a4d9-1.html'
    label: twcert@cert.org.tw
tags:
  - nvd
epss: 0.00992
epssPercentile: 0.60959
ingestedAt: '2026-07-07T08:52:24.798Z'
---

## Overview

EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and execute arbitrary code.

## Affected

- `atop_ehg2408_firmware < 3.36`
- `atop_ehg2408-2sfp_firmware < 3.36`

## Remediation

Upgrade past the affected range:

- `atop_ehg2408_firmware 3.36`
- `atop_ehg2408-2sfp_firmware 3.36`