🛡️ CVE-2026-3823 — atop-ehg2408-2sfp-firmware

🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-121 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-3823 is classified as CWE-121: Stack-based Buffer Overflow. An oversized write to a stack buffer overwrites saved state such as return addresses, which can redirect execution.

Affected software

CVE-2026-3823 is recorded against 2 packages.

  • atop-ehg2408-2sfp-firmware (fixed in 3.36)
  • atop-ehg2408-firmware (fixed in 3.36)

Timeline and source

Published on 9 March 2026 and last revised on 7 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.twcert.org.tw
www.twcert.org.tw

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-121
Public Exploit ✅ No
Source NVD
Published 2026-03-09
Updated 2026-08-11
Modified 2026-07-07
Fix URL N/A

Affected Packages

Software From version Fixed in
atop-ehg2408-2sfp-firmware — 3.36
atop-ehg2408-firmware — 3.36

Exploit Protection

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CVE-2026-3823 carries CVSS 9.8 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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