CVE-2026-27507: Binardat

Overview

A critical security vulnerability has been identified in certain Binardat network switch models. The firmware contains unchangeable, factory-set administrative usernames and passwords (often called “hard-coded credentials”). This flaw allows anyone with knowledge of these credentials to gain complete control over the affected network device.

Vulnerability Details

This vulnerability, tracked as CVE-2026-27507, affects Binardat 10G08-0800GSM network switches running firmware version V300SP10260209 and all earlier versions. The core issue is that the administrative credentials are permanently embedded in the device’s software. These credentials cannot be altered or disabled by the system administrator, rendering the device’s standard login security ineffective.

Impact and Risk

The severity of this vulnerability is rated as CRITICAL with a CVSS score of 9.8. An attacker who discovers these default credentials can gain full administrative access to the switch. This would allow them to:

• Intercept or redirect network traffic, enabling data theft or surveillance.
• Disable the switch entirely, causing a complete network outage for connected systems.
• Use the compromised switch as a foothold to launch further attacks deeper into the corporate network.
• Change network configurations to disrupt business operations.

Since these credentials are static and unchangeable, the risk is persistent and cannot be mitigated by user action alone.

Remediation and Mitigation

Immediate action is required for all users of the affected Binardat 10G08-0800GSM switches.

Primary Remediation:

1. Contact the Vendor: Immediately reach out to Binardat support to inquire about the availability of a fixed firmware version that removes the hard-coded credentials.
2. Apply the Update: If a patched firmware version (newer than V300SP10260209) is released, apply it to all affected switches as soon as possible following a tested change management process.

Immediate Mitigation Steps (If a Patch is Not Yet Available):

• Network Segmentation: Isolate the affected switches on a dedicated network segment (VLAN) with strict firewall rules. Limit their access to only essential management networks and block all inbound management access from the internet.
• Access Control Lists (ACLs): Implement stringent ACLs on routers and firewalls surrounding the vulnerable devices to restrict which source IP addresses can attempt to connect to the switch’s management interfaces (e.g., SSH, Telnet, Web GUI).
• Monitor Logs: Closely monitor network traffic and switch authentication logs for any unauthorized access attempts, particularly from unfamiliar IP addresses.

Important Note: Simply trying to change the administrator password on the device will not resolve this vulnerability, as the hard-coded credentials remain active in the background. A vendor-provided firmware update is the only complete solution.