CVE-2026-27752: Sodola SL902 Firmware Information Disclosure

CVE-2026-27752 Overview

CVE-2026-27752 is a cleartext transmission vulnerability affecting SODOLA SL902-SWTGW124AS network gateway devices. The firmware versions through 200.1.20 transmit authentication credentials over unencrypted HTTP connections, allowing attackers positioned on the network path to capture and reuse credentials for unauthorized administrative access.

This vulnerability falls under CWE-319 (Cleartext Transmission of Sensitive Information), a well-known weakness that exposes authentication data to interception attacks. An attacker who can observe network traffic between a user and the device—through techniques such as ARP spoofing, network sniffing on shared segments, or compromised network infrastructure—can capture valid credentials and subsequently gain full administrative control of the gateway.

Critical Impact

Attackers can intercept administrative credentials transmitted in cleartext over HTTP, enabling complete takeover of the network gateway device.

Affected Products

• SODOLA SL902-SWTGW124AS Firmware versions through 200.1.20
• SODOLA SL902-SWTGW124AS Hardware Device

Discovery Timeline

• 2026-02-27 - CVE-2026-27752 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2026-27752

Vulnerability Analysis

The SODOLA SL902-SWTGW124AS is a 6-port 2.5G managed network switch with web-based administration capabilities. The device's web management interface transmits user credentials—including usernames and passwords—over unencrypted HTTP rather than HTTPS. This fundamental security oversight means that any authentication attempt to the device's management interface sends credentials in plaintext across the network.

The vulnerability is particularly concerning in enterprise or shared network environments where an attacker may have access to network traffic. Even in home lab scenarios, the lack of transport layer encryption exposes credentials to anyone with the ability to capture packets on the local network segment.

Root Cause

The root cause of this vulnerability is the absence of TLS/SSL encryption for the web management interface. The device firmware does not implement HTTPS for administrative communications, nor does it appear to offer any option to enable encrypted connections. This design flaw results in all authentication data being transmitted in cleartext, making credential theft trivial for anyone with network access.

Attack Vector

Exploitation of this vulnerability requires network-level access to observe traffic between the victim and the SODOLA device. The attack vector is network-based, requiring no authentication or user interaction from the victim beyond normal login activity. An attacker could exploit this vulnerability through several methods:

1. Passive network sniffing - On shared network segments or compromised switches, an attacker can capture HTTP traffic containing credentials
2. Man-in-the-middle positioning - Using ARP spoofing or similar techniques to intercept traffic between the user and the device
3. Compromised network infrastructure - Gaining access to routers or switches that can mirror or forward traffic

Once credentials are captured, the attacker can authenticate to the device's management interface and gain full administrative control, potentially modifying network configurations, creating backdoor accounts, or using the device as a pivot point for further attacks.

Detection Methods for CVE-2026-27752

Indicators of Compromise

• HTTP traffic containing authentication payloads to the SODOLA device management interface (typically port 80)
• Unexpected administrative sessions or login events on SODOLA gateway devices
• Configuration changes to the device that were not authorized by legitimate administrators
• Network traffic analysis showing unencrypted credential exchanges with the device's web interface

Detection Strategies

• Monitor network traffic for HTTP (port 80) connections to SODOLA device IP addresses that contain authentication parameters
• Implement network detection rules to alert on cleartext credential patterns in HTTP traffic
• Deploy network intrusion detection systems (IDS) with signatures for credential interception attempts
• Review device access logs for unauthorized administrative sessions from unexpected source addresses

Monitoring Recommendations

• Segment SODOLA devices onto isolated management VLANs with restricted access
• Implement network traffic analysis to identify cleartext credential transmission
• Enable logging on upstream network devices to track access to the SODOLA management interface
• Deploy packet capture capabilities on management network segments for forensic analysis

How to Mitigate CVE-2026-27752

Immediate Actions Required

• Restrict network access to the SODOLA device management interface to trusted management stations only
• Place the device on an isolated management VLAN with strict access controls
• Use a VPN or SSH tunnel when accessing the device's web interface from untrusted networks
• Change administrative credentials regularly and use strong, unique passwords
• Monitor for firmware updates from SODOLA that may address this vulnerability

Patch Information

As of the last NVD update on 2026-03-03, no vendor patch has been publicly announced for this vulnerability. Organizations should monitor the VulnCheck Security Advisory and the SODOLA product page for updates regarding firmware versions that address cleartext credential transmission.

Workarounds

• Implement network segmentation to isolate SODOLA devices from general user networks
• Use a reverse proxy with TLS termination in front of the device's web interface if the infrastructure supports it
• Access the management interface only from physically secure, isolated management workstations
• Consider replacing affected devices with alternatives that support HTTPS management interfaces if a patch is not forthcoming
• Implement 802.1X port-based authentication to limit who can access the management network segment

# Example: Network segmentation using VLAN isolation
# Place SODOLA device on dedicated management VLAN (VLAN 99)
# On upstream managed switch:
interface GigabitEthernet0/1
  description SODOLA_MGMT_INTERFACE
  switchport mode access
  switchport access vlan 99
  spanning-tree portfast

# Restrict access to management VLAN via ACL
ip access-list extended MGMT_VLAN_ACCESS
  permit ip host 10.0.99.10 10.0.99.0 0.0.0.255
  deny ip any 10.0.99.0 0.0.0.255
  permit ip any any