CVE-2026-3823

Received Received - Intake

Stack-Based Buffer Overflow in Atop EHG2408 Enables Remote Code Execution

Publication date: 2026-03-09

Last updated on: 2026-03-10

Assigner: TWCERT/CC

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-03-09

Last Modified

2026-03-10

Generated

2026-07-06

AI Q&A

2026-03-09

EPSS Evaluated

2026-07-05

NVD

CVE-2026-3823

EUVD

EUVD-2026-10301

Affected Vendors & Products

Vendor	Product	Version / Range
blackbeartechhive	atop_ehg2408_firmware	to 3.36 (exc)
blackbeartechhive	atop_ehg2408-2sfp_firmware	to 3.36 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-3823 is a critical stack-based buffer overflow vulnerability affecting the Atop Technologies EHG2408 series switches, including models EHG2408 and EHG2408-2SFP.'}, {'type': 'paragraph', 'content': "This vulnerability allows unauthenticated remote attackers to manipulate the program's execution flow and execute arbitrary code on the affected devices."}, {'type': 'paragraph', 'content': 'It affects firmware versions prior to 3.36, and the recommended mitigation is to update the firmware to version 3.36 or later.'}] [1, 2]

Impact Analysis

This vulnerability can have severe impacts as it allows unauthenticated remote attackers to take control of the affected device by executing arbitrary code.

Such control can lead to unauthorized access, disruption of network operations, data compromise, or use of the device as a foothold for further attacks.

Because the vulnerability is exploitable remotely without authentication, it poses a high risk to network security.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate the CVE-2026-3823 vulnerability in Atop Technologies EHG2408 series switches, the immediate step is to update the device firmware to version 3.36 or later.

This update addresses the critical stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to execute arbitrary code.

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