CVE-2026-27507: Binardat 10g08-0800gsm Auth Bypass Flaw

CVE-2026-27507 Overview

CVE-2026-27507 is a critical hardcoded credentials vulnerability affecting Binardat 10G08-0800GSM network switch firmware version V300SP10260209 and prior. The firmware contains hard-coded administrative credentials that cannot be changed by users, allowing attackers with knowledge of these credentials to gain full administrative access to affected devices.

Critical Impact

Attackers who obtain knowledge of the hard-coded credentials can achieve complete administrative control over affected Binardat network switches, potentially compromising network infrastructure integrity and enabling lateral movement within enterprise environments.

Affected Products

• Binardat 10G08-0800GSM Firmware (version V300SP10260209 and prior)
• Binardat 10G08-0800GSM Hardware

Discovery Timeline

• 2026-02-24 - CVE-2026-27507 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2026-27507

Vulnerability Analysis

This vulnerability is classified as CWE-798 (Use of Hard-Coded Credentials), representing a significant security design flaw in the Binardat 10G08-0800GSM network switch firmware. The device ships with administrative credentials embedded directly in the firmware that users cannot modify or disable. This architectural weakness creates a persistent backdoor that affects all deployed instances of the vulnerable hardware.

Network switches are critical infrastructure components that handle traffic routing and network segmentation. Compromise of these devices can allow attackers to intercept network traffic, modify routing configurations, disable security features, or use the switch as a pivot point for further network intrusion.

Root Cause

The root cause of CVE-2026-27507 is the embedding of static administrative credentials within the device firmware without providing users a mechanism to change or disable them. This is a fundamental security design flaw that violates secure development principles. The hard-coded credentials likely exist for factory reset, debugging, or support purposes, but their immutable nature creates an exploitable security gap.

Attack Vector

The vulnerability is exploitable over the network without requiring authentication or user interaction. An attacker who discovers or obtains the hard-coded credentials can authenticate to the device's management interface (web-based or CLI) with full administrative privileges. Attack scenarios include:

The exploitation process involves identifying vulnerable Binardat 10G08-0800GSM switches on a network, then using the known hard-coded credentials to authenticate to the device management interface. Once authenticated, the attacker has complete control over switch configuration, including VLAN settings, port mirroring, access control lists, and firmware management. This access could be leveraged to perform traffic interception, create persistent backdoors, or pivot to other network segments.

Detection Methods for CVE-2026-27507

Indicators of Compromise

• Unexpected administrative login events to Binardat switch management interfaces
• Configuration changes not authorized by network administrators
• New or modified user accounts on network switch devices
• Unusual network traffic patterns originating from switch management interfaces
• Unauthorized firmware updates or configuration backups

Detection Strategies

• Monitor authentication logs for successful logins using default or unknown credentials
• Implement network monitoring to detect access attempts to switch management interfaces from unauthorized IP ranges
• Deploy network access control to restrict management interface access to authorized administrator workstations only
• Conduct regular configuration audits comparing current device state against known-good baselines

Monitoring Recommendations

• Enable comprehensive logging on all Binardat network switches and forward logs to a centralized SIEM
• Configure alerts for any administrative authentication events outside of scheduled maintenance windows
• Monitor for network scanning activity targeting switch management ports (HTTP/HTTPS, SSH, Telnet)
• Implement network traffic analysis to detect unusual management traffic patterns

How to Mitigate CVE-2026-27507

Immediate Actions Required

• Isolate management interfaces of affected Binardat switches to a dedicated out-of-band management network
• Implement strict network access control lists limiting management interface access to specific administrator IP addresses
• Enable and monitor all available logging on affected devices
• Contact Binardat for updated firmware that addresses this vulnerability
• Consider replacing affected devices if no firmware update is available

Patch Information

No vendor patch information is currently available in the CVE data. Organizations should monitor the Binardat product page and the VulnCheck Advisory for updates regarding security patches.

Workarounds

• Segment management interfaces on a dedicated VLAN with strict firewall rules
• Implement 802.1X or other network access control to prevent unauthorized devices from reaching management interfaces
• Deploy a jump server or bastion host as the only authorized system for switch management access
• Use network monitoring tools to alert on any unauthorized access attempts to switch management interfaces

# Example network segmentation configuration (generic switch ACL)
# Restrict management access to specific administrator subnet
access-list 100 permit tcp 10.0.99.0 0.0.0.255 any eq 443
access-list 100 permit tcp 10.0.99.0 0.0.0.255 any eq 22
access-list 100 deny tcp any any eq 443
access-list 100 deny tcp any any eq 22