Summary
Tycon Systems TPDIN-Monitor-WEB2 units running firmware 2.4.4 or earlier may expose their web management interface without requiring authentication when HTTP credentials have not been configured. An attacker with network access to an unconfigured device could obtain full administrative control, potentially disrupting connected infrastructure or causing physical equipment damage.
Tycon Systems TPDIN-Monitor-WEB2 units running firmware 2.4.4 or earlier may expose their web management interface without requiring authentication when HTTP credentials have not been configured. An attacker with network access to an unconfigured device could obtain full administrative control, potentially disrupting connected infrastructure or causing physical equipment damage.
Affected context
The vulnerability occurs on TPDIN-Monitor-WEB2 devices that remain in their initial, unconfigured state after deployment. On affected firmware, the web management interface may be accessible without a login when installer-defined HTTP credentials have not been set, exposing controls for power relays, device reboot, remote access services, and network configuration.
The vulnerability occurs on TPDIN-Monitor-WEB2 devices that remain in their initial, unconfigured state after deployment. On affected firmware, the web management interface may be accessible without a login when installer-defined HTTP credentials have not been set, exposing controls for power relays, device reboot, remote access services, and network configuration.
Exploit preconditions
- Attack surface: Network-accessible web management interface
- Required access: Network connectivity to the affected TPDIN-Monitor-WEB2 unit
- Device state: HTTP credentials have not been configured
- Trigger point: Requesting the web management interface and administrative functions
- Why exploitation is possible: The device permits access to management operations without first verifying user identity
- Attack surface: Network-accessible web management interface
- Required access: Network connectivity to the affected TPDIN-Monitor-WEB2 unit
- Device state: HTTP credentials have not been configured
- Trigger point: Requesting the web management interface and administrative functions
- Why exploitation is possible: The device permits access to management operations without first verifying user identity
Why this happens
The underlying issue is a missing authentication enforcement control on a management interface. The device is designed to receive credentials during installation, but an unconfigured state leaves administrative functions available without an effective login requirement. This maps to CWE-306: Missing Authentication for Critical Function, because sensitive operations can be reached without establishing that the requester is authorized.
The underlying issue is a missing authentication enforcement control on a management interface. The device is designed to receive credentials during installation, but an unconfigured state leaves administrative functions available without an effective login requirement. This maps to CWE-306: Missing Authentication for Critical Function, because sensitive operations can be reached without establishing that the requester is authorized.
Potential impact
- An attacker may change power relay states
- Connected equipment could be disrupted or powered off
- The device may be rebooted, affecting availability
- Remote access services could be enabled or reconfigured
- Network settings could be altered, causing loss of connectivity
- Physical equipment may be damaged depending on connected loads and safety controls
- Attackers could use the device as a foothold for further network activity
- An attacker may change power relay states
- Connected equipment could be disrupted or powered off
- The device may be rebooted, affecting availability
- Remote access services could be enabled or reconfigured
- Network settings could be altered, causing loss of connectivity
- Physical equipment may be damaged depending on connected loads and safety controls
- Attackers could use the device as a foothold for further network activity
General mitigation guidance
Mitigation generally focuses on ensuring that management interfaces require authentication before exposing any administrative function.
Common defensive patterns include:
- Require strong, unique HTTP credentials during initial commissioning
- Prevent an unconfigured state from granting access to management operations
- Place device administration interfaces on restricted management networks
- Limit access using network segmentation and allowlists where appropriate
- Disable or restrict remote access services unless operationally required
- Apply least-privilege administrative roles when supported
- Treat first-use setup as a security-enforcing state transition rather than an optional step
- Monitor and review changes to relay, network, reboot, and remote-access settings
Mitigation generally focuses on ensuring that management interfaces require authentication before exposing any administrative function.
Common defensive patterns include:
- Require strong, unique HTTP credentials during initial commissioning
- Prevent an unconfigured state from granting access to management operations
- Place device administration interfaces on restricted management networks
- Limit access using network segmentation and allowlists where appropriate
- Disable or restrict remote access services unless operationally required
- Apply least-privilege administrative roles when supported
- Treat first-use setup as a security-enforcing state transition rather than an optional step
- Monitor and review changes to relay, network, reboot, and remote-access settings
How teams detect issues like this
Organizations can identify this condition through:
- Authenticated and unauthenticated checks against device management interfaces
- Asset inventories that track commissioning and credential configuration status
- Network scans that identify exposed device administration services
- Configuration reviews verifying that default or empty credential states are prohibited
- Code and firmware reviews for management routes that do not invoke authentication middleware
- Policy enforcement requiring secure commissioning before devices are connected to production networks
- Monitoring for unexpected relay changes, reboots, network-setting updates, or remote-access configuration changes
Organizations can identify this condition through:
- Authenticated and unauthenticated checks against device management interfaces
- Asset inventories that track commissioning and credential configuration status
- Network scans that identify exposed device administration services
- Configuration reviews verifying that default or empty credential states are prohibited
- Code and firmware reviews for management routes that do not invoke authentication middleware
- Policy enforcement requiring secure commissioning before devices are connected to production networks
- Monitoring for unexpected relay changes, reboots, network-setting updates, or remote-access configuration changes
