CVE-2026-27516: Binardat 10g08-0800gsm Information Disclosure

CVE-2026-27516 Overview

CVE-2026-27516 is a sensitive data exposure vulnerability affecting Binardat 10G08-0800GSM network switch firmware version V300SP10260209 and prior. The vulnerability allows authenticated attackers with low privileges to recover valid user credentials due to improper handling of sensitive information. User passwords are exposed in plaintext within the administrative interface and HTTP responses, enabling credential theft that could lead to complete device compromise.

Critical Impact

Attackers can extract valid user credentials in plaintext from administrative interfaces and HTTP responses, potentially gaining full administrative access to network infrastructure devices.

Affected Products

• Binardat 10G08-0800GSM Firmware (version V300SP10260209 and prior)
• Binardat 10G08-0800GSM Hardware (all versions running affected firmware)

Discovery Timeline

• 2026-02-24 - CVE-2026-27516 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2026-27516

Vulnerability Analysis

This vulnerability falls under CWE-201 (Insertion of Sensitive Information Into Sent Data), which describes scenarios where an application inappropriately includes sensitive data in outbound communications. In this case, the Binardat 10G08-0800GSM network switch fails to properly protect user credentials, exposing them in plaintext through both the administrative web interface and HTTP response data.

The affected switch is an 8-port 10-Gigabit SFP managed network switch commonly deployed in enterprise and data center environments. The exposure of credentials in plaintext represents a fundamental security design flaw, as modern security best practices mandate that passwords never be stored or transmitted in cleartext form.

Root Cause

The root cause of this vulnerability is improper handling of sensitive authentication data within the switch's firmware. Rather than properly hashing or encrypting user credentials before storage and transmission, the firmware stores and displays passwords in plaintext format. This design flaw allows any user with access to the administrative interface to view credentials for other accounts, including potentially higher-privileged administrator accounts.

Attack Vector

The attack is network-based and requires low privileges to exploit. An attacker who has gained initial access to the administrative interface—even with limited permissions—can extract plaintext credentials from HTTP responses or visible interface elements.

The exploitation flow typically involves:

1. Gaining initial authenticated access to the switch's web management interface with any valid user account
2. Navigating to user management or configuration sections
3. Observing plaintext passwords in HTTP responses or displayed directly in the interface
4. Using recovered credentials to escalate privileges or access other network devices where credentials may be reused

Since no public exploit code has been verified, the vulnerability mechanism is described in prose. According to the VulnCheck Advisory on Password Exposure, the plaintext credentials are accessible through standard HTTP requests to the administrative interface. Administrators and security teams should review the advisory for specific technical details on affected endpoints.

Detection Methods for CVE-2026-27516

Indicators of Compromise

• Unusual access patterns to user management or configuration pages on affected Binardat switches
• HTTP traffic containing plaintext credential data in response bodies from switch management interfaces
• Login attempts using credentials that were not explicitly shared with the authenticating party
• Unauthorized configuration changes following credential exposure

Detection Strategies

• Monitor HTTP traffic to and from Binardat switch management interfaces for plaintext password strings in response payloads
• Implement network traffic analysis to detect unencrypted administrative traffic to affected devices
• Review access logs for the switch's administrative interface to identify suspicious enumeration of user accounts
• Deploy intrusion detection signatures targeting plaintext credential exposure patterns in network switch management protocols

Monitoring Recommendations

• Enable comprehensive logging on all Binardat 10G08-0800GSM switches and forward logs to a centralized SIEM
• Configure alerts for multiple failed login attempts followed by successful authentication, which may indicate credential harvesting and reuse
• Monitor for lateral movement attempts using switch administrator credentials across network infrastructure
• Implement network segmentation to restrict access to switch management interfaces from untrusted network segments

How to Mitigate CVE-2026-27516

Immediate Actions Required

• Restrict network access to the administrative interface of affected Binardat switches to trusted management networks only
• Implement strong network segmentation to isolate management traffic from general user traffic
• Change all user passwords on affected devices and ensure unique credentials are used across different network devices
• Deploy HTTPS-only access to management interfaces if supported by the firmware
• Audit user accounts on affected switches and remove any unnecessary or unused accounts

Patch Information

At the time of publication, no vendor patch information was available in the NVD database. Administrators should monitor the Binardat Product Page and the VulnCheck Advisory for updates regarding firmware patches that address this vulnerability.

Workarounds

• Implement access control lists (ACLs) on upstream network devices to restrict management interface access to authorized IP addresses only
• Use a jump host or bastion server for all administrative access to affected switches
• Deploy a VPN or out-of-band management network for switch administration
• Consider replacing affected devices with alternatives that implement proper credential security if no patch becomes available

# Example ACL configuration to restrict management access (apply on upstream router/firewall)
# Allow management access only from trusted admin subnet
iptables -A INPUT -p tcp --dport 80 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP