CVE-2026-27519 identifies a cryptographic vulnerability in the Binardat Ltd. 10G08-0800GSM network switch firmware version V300SP10260209 and earlier. The device employs the RC4 stream cipher with a hard-coded cryptographic key embedded directly in client-side JavaScript code. This key is static and publicly accessible, violating cryptographic best practices and CWE-321 (Use of Hard-coded Cryptographic Key) and CWE-327 (Use of a Broken or Risky Cryptographic Algorithm). Because RC4 is considered insecure and the key is exposed, an attacker can easily decrypt sensitive data that the device attempts to protect, defeating confidentiality guarantees. The vulnerability requires no authentication or user interaction and can be exploited remotely over the network, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The flaw affects all firmware versions up to V300SP10260209. Although no exploits have been reported in the wild, the simplicity of the attack and the critical nature of network switch data make this a serious threat. The lack of patch links suggests that a fix may not yet be available, emphasizing the need for immediate mitigation steps.

The primary impact of this vulnerability is the compromise of confidentiality for data protected by the affected network switches. Attackers can decrypt sensitive configuration data, credentials, or network traffic that rely on the flawed RC4 encryption with the hard-coded key. This exposure can lead to further attacks such as network reconnaissance, unauthorized access, or data exfiltration. Since network switches are critical infrastructure components, their compromise can disrupt network operations and undermine trust in organizational security. The vulnerability's ease of exploitation and lack of required privileges increase the risk of widespread abuse. Organizations relying on Binardat 10G08-0800GSM switches may face regulatory compliance issues and reputational damage if sensitive data is leaked or network integrity is compromised.

Organizations should immediately assess their deployment of Binardat 10G08-0800GSM network switches and identify affected firmware versions. Since no official patches are currently available, mitigation should focus on minimizing exposure: restrict network access to management interfaces, implement network segmentation to isolate vulnerable devices, and monitor for unusual traffic patterns that may indicate exploitation attempts. Where possible, disable or replace the use of RC4 encryption in device configurations. Engage with Binardat Ltd. for firmware updates or security advisories. Consider deploying compensating controls such as encrypted VPN tunnels for management traffic and enhanced logging to detect suspicious activity. Long-term mitigation involves upgrading to firmware versions that remove hard-coded keys and use modern cryptographic standards. Regularly review device configurations to avoid embedding static keys or weak ciphers in client-side code.