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.
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Meta Information
Published
2026-03-09
Last Modified
2026-03-10
Generated
2026-06-16
AI Q&A
2026-03-09
EPSS Evaluated
2026-06-15
NVD
CVE-2026-3823
EUVD
EUVD-2026-10301
Affected Vendors & Products
Showing 2 associated CPEs
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
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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).
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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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