CVE-2026-3823: Atop Technologies｜EHG2408 series switch - Stack-based Buffer Overflow

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-09 · updated 2026-07-07
Weakness: CWE-121

Description

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

How to fix

Upgrade to a fixed version: Blackbeartechhive Atop Ehg2408-2Sfp Firmware 3.36; Blackbeartechhive Atop Ehg2408 Firmware 3.36. Check the vendor advisory for mitigations.

References

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