What is CVE-2026-3823?

CVE-2026-3823 is a critical-severity vulnerability in Atop Technologies Ehg2408, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-03-09.

How severe is CVE-2026-3823?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Atop Technologies Ehg2408

CVE-2026-3823

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.

Vulnerability class: Buffer Overflow

EPSS: 0.007 (50.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Atop Technologies Ehg2408 — versions 0
Atop Technologies Ehg2408-2sfp — versions 0
Blackbeartechhive Atop_ehg2408
Blackbeartechhive Atop_ehg2408-2sfp
Blackbeartechhive Atop_ehg2408-2sfp_firmware
Blackbeartechhive Atop_ehg2408_firmware

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow
CWE-787 — Out-of-bounds Write

References

twcert@cert.org.tw (Third Party Advisory, third-party-advisory)
twcert@cert.org.tw (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-3823?: CVE-2026-3823 is a critical-severity vulnerability in Atop Technologies Ehg2408, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-03-09.
How severe is CVE-2026-3823?: Critical severity. CVSS v3 base score is 9.8 out of 10.