Executive Summary

CVE-2026-27519 affects the Binardat 10G08-0800GSM network switch firmware version V300SP10260209 and earlier. The vulnerability arises because the firmware uses a hard-coded RC4 encryption key embedded in client-side JavaScript.

Since the key is static and exposed, attackers can use it to decrypt protected values, effectively defeating the confidentiality protections intended by the encryption.

This issue is categorized under CWE-321 (Use of Hard-coded Cryptographic Key) and CWE-327 (Use of a Broken or Risky Cryptographic Algorithm).

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Impact Analysis

Because the encryption key is hard-coded and exposed, an attacker can remotely decrypt sensitive information without needing any privileges or user interaction.

This compromises the confidentiality of data protected by the encryption, potentially exposing sensitive or private information handled by the network switch.

The vulnerability has a high severity rating with a CVSS v4 score of 8.7, indicating a significant risk.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability involves the use of a hard-coded RC4 encryption key embedded in client-side JavaScript on Binardat 10G08-0800GSM network switches with firmware version V300SP10260209 and prior.'}, {'type': 'paragraph', 'content': "To detect this vulnerability, you can inspect the client-side JavaScript served by the network switch for the presence of a static RC4 key. This can be done by capturing the network traffic or accessing the web interface's JavaScript files."}, {'type': 'paragraph', 'content': "Suggested commands include using tools like curl or wget to download the JavaScript files from the switch's web interface and then searching for RC4 keys or suspicious hard-coded cryptographic keys."}, {'type': 'list_item', 'content': 'curl http://<switch-ip>/path/to/javascript.js -o switch.js'}, {'type': 'list_item', 'content': "grep -i 'rc4' switch.js"}, {'type': 'list_item', 'content': "grep -Eo '([a-f0-9]{2}){16,}' switch.js # to find potential hex keys"}, {'type': 'paragraph', 'content': 'Additionally, network traffic analysis tools like Wireshark can be used to capture and analyze encrypted traffic to check if the encryption can be trivially decrypted using a known static key.'}] [1]

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'Immediate mitigation steps include upgrading the firmware of the Binardat 10G08-0800GSM network switch to a version later than V300SP10260209 where this vulnerability is fixed.'}, {'type': 'paragraph', 'content': "If an upgrade is not immediately possible, restrict access to the switch's web interface to trusted networks only to reduce the risk of remote exploitation."}, {'type': 'paragraph', 'content': 'Monitor network traffic for suspicious activity and consider disabling any features that rely on the vulnerable RC4 encryption until a patch is applied.'}, {'type': 'paragraph', 'content': 'Contact the vendor or check official advisories for patches or workarounds addressing the hard-coded RC4 key issue.'}] [1]

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