CVE-2026-27758: Sodola SL902-SWTGW124AS CSRF Vulnerability

CVE-2026-27758 Overview

A Cross-Site Request Forgery (CSRF) vulnerability exists in SODOLA SL902-SWTGW124AS network switch firmware versions through 200.1.20. The device's management interface lacks proper CSRF protections, allowing attackers to craft malicious web pages that induce authenticated administrators into submitting forged requests. When a victim with an active management session visits a malicious webpage, attackers can execute unauthorized configuration changes or administrative actions using the victim's authenticated session.

Critical Impact

Attackers can manipulate network switch configurations, modify VLAN settings, change administrative credentials, or disrupt network operations by exploiting authenticated administrator sessions without their knowledge.

Affected Products

• SODOLA SL902-SWTGW124AS Firmware versions through 200.1.20
• SODOLA SL902-SWTGW124AS Hardware (6-Port 2.5G Easy Web Managed Switch)

Discovery Timeline

• 2026-02-27 - CVE-2026-27758 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2026-27758

Vulnerability Analysis

This Cross-Site Request Forgery vulnerability stems from the management interface's failure to implement anti-CSRF tokens or other state-changing request validation mechanisms. The web-based management console accepts and processes administrative requests without verifying that the request originated from a legitimate user interaction within the management interface.

CSRF attacks exploit the trust that a web application has in the user's browser. When an administrator is authenticated to the switch's management interface, their browser automatically includes session cookies with every request to the device. An attacker who can trick the administrator into visiting a malicious website can leverage this behavior to send forged requests that the switch will process as legitimate.

The vulnerability affects network infrastructure equipment, making it particularly concerning as successful exploitation could lead to network-wide disruptions, unauthorized access, or security policy changes.

Root Cause

The root cause is the absence of CSRF protection mechanisms in the SODOLA SL902-SWTGW124AS management interface. The firmware fails to implement industry-standard defenses such as:

• Synchronizer (anti-CSRF) tokens for state-changing operations
• Same-site cookie attributes
• Origin or Referer header validation
• Custom request headers that cannot be set cross-origin

Without these protections, the management interface cannot distinguish between legitimate administrator actions and forged requests initiated by malicious third-party websites.

Attack Vector

The attack follows a network-based vector requiring user interaction. An attacker must:

1. Craft a malicious webpage containing hidden forms or JavaScript that generate requests to the switch's management interface
2. Host this malicious content on a server accessible to the target administrator
3. Entice the administrator to visit the malicious page while they have an active authenticated session to the switch
4. The victim's browser automatically submits the forged request with valid session credentials

The malicious page could be delivered through phishing emails, compromised websites, malicious advertisements, or watering hole attacks targeting network administrators.

When exploitation occurs, the forged requests execute with the victim's privileges, potentially allowing attackers to change administrative passwords, modify network configurations, alter VLAN settings, disable security features, or cause denial of service conditions.

For technical details on the vulnerability mechanism, refer to the VulnCheck Security Advisory.

Detection Methods for CVE-2026-27758

Indicators of Compromise

• Unexpected configuration changes on SODOLA SL902-SWTGW124AS switches without corresponding administrator activity
• Administrative password resets or new user account creation without authorization
• Unusual network traffic patterns indicating VLAN or routing configuration modifications
• Browser history on administrator workstations showing visits to suspicious or unfamiliar websites coinciding with switch configuration changes

Detection Strategies

• Monitor switch audit logs for configuration changes and correlate with administrator activity records
• Implement network-based detection for HTTP requests to switch management interfaces originating from external referrers
• Deploy web proxy solutions that can inspect and log traffic to internal management interfaces
• Review administrator workstation browser logs for suspicious site visits prior to unauthorized configuration changes

Monitoring Recommendations

• Enable comprehensive logging on all SODOLA network switches and forward logs to a centralized SIEM
• Configure alerts for administrative actions performed outside of maintenance windows
• Implement network segmentation to restrict management interface access to dedicated management VLANs
• Monitor for unusual patterns of administrative API calls or management interface requests

How to Mitigate CVE-2026-27758

Immediate Actions Required

• Restrict management interface access to a dedicated, isolated management network segment
• Implement strict firewall rules limiting which IP addresses can access the switch management interface
• Train administrators to use dedicated browsers or browser profiles exclusively for network device management
• Ensure administrators log out of management sessions immediately after completing administrative tasks

Patch Information

At the time of publication, no vendor patch has been announced for this vulnerability. Organizations should monitor the Sodola Product Page for firmware updates that address this CSRF vulnerability. Contact Sodola Network support for security update availability timelines.

Workarounds

• Place the switch management interface on an isolated management VLAN with strict access controls
• Use a web application firewall (WAF) or reverse proxy in front of the management interface to add CSRF protection
• Configure host-based firewall rules on administrator workstations to block management interface access from non-management browser contexts
• Consider implementing network access control (NAC) to ensure only authorized devices can reach management interfaces

# Example: Restrict management access via upstream firewall/ACL
# Only allow management access from specific admin workstations
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -s 10.10.10.0/24 -j ACCEPT
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -j DROP