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

Published 2026-03-09 · last modified 2026-07-07.

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.

EPSS exploit prediction

EPSS: 0.010 (61.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.010 · change: +0.003

Affected products

Weakness classification (CWE)

References

www.twcert.org.tw/tw/cp-132-10752-5a4d9-1.html (Third Party Advisory, third-party-advisory)
www.twcert.org.tw/en/cp-139-10753-e091e-2.html (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.