CVE-2026-3823

Severity CVSS v4.0:

CRITICAL

Type:

CWE-121 Stack-based Buffer Overflow

Publication date:

09/03/2026

Last modified:

10/03/2026

Description

EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program&#39;s execution flow and execute arbitrary code.

Impact

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 9.30 CRITICAL
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0

9.30

Severity 4.0

CRITICAL

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:blackbeartechhive:atop_ehg2408_firmware::::::::		3.36 (excluding)
cpe:2.3:h:blackbeartechhive:atop_ehg2408:-:::::::*
cpe:2.3:o:blackbeartechhive:atop_ehg2408-2sfp_firmware::::::::		3.36 (excluding)
cpe:2.3:h:blackbeartechhive:atop_ehg2408-2sfp:-:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-3823

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools