CVE-2026-3823: Blackbeartechhive Atop EHG2408-2sfp Firmware

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

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 products

• Blackbeartechhive Atop EHG2408-2sfp Firmware: before 3.36 (fixed in 3.36)
• Blackbeartechhive Atop EHG2408 Firmware: before 3.36 (fixed in 3.36)

Published 2026-03-09. Last modified 2026-07-07.