CVE-2026-3823
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
Description
CVSS Scores
EPSS Scores
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Meta Information
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 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
AI Powered Q&A
Can you explain this vulnerability to me?
[{'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]
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.