CVE-2026-1775: Labkotec LID-3300IP Auth Bypass Vulnerability

CVE-2026-1775 Overview

The Labkotec LID-3300IP ice detector contains a critical vulnerability in its software that enables unauthenticated attackers to alter device parameters and execute operational commands. This vulnerability stems from missing authentication for critical functions (CWE-306), allowing attackers to send specially crafted packets to the device without any credential verification.

This vulnerability is particularly concerning in industrial control system (ICS) environments where ice detectors are deployed for safety-critical applications such as aviation, wind energy, and transportation infrastructure monitoring.

Critical Impact

Unauthenticated remote attackers can manipulate ice detection parameters and execute operational commands, potentially compromising safety-critical infrastructure that relies on accurate ice detection.

Affected Products

• Labkotec LID-3300IP Ice Detector

Discovery Timeline

• 2026-03-03 - CVE-2026-1775 published to NVD
• 2026-03-04 - Last updated in NVD database

Technical Details for CVE-2026-1775

Vulnerability Analysis

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306). The Labkotec LID-3300IP ice detector software fails to properly implement authentication mechanisms for its network-accessible command interface. An attacker with network access to the device can send specially crafted packets that modify device parameters or trigger operational commands without providing valid credentials.

The attack surface is network-based, requiring no user interaction or prior authentication. The vulnerability enables attackers to achieve high integrity and availability impact on the target device, with some confidentiality impact as well. Successful exploitation could result in incorrect ice detection readings, disabled safety alerts, or complete device malfunction.

Root Cause

The root cause of this vulnerability is the absence of authentication controls in the device's network communication protocol. The ice detector software accepts and processes commands from any network source without verifying the identity or authorization of the sender. This design flaw allows any network-adjacent or remote attacker to interact with critical device functions as if they were an authorized administrator.

Attack Vector

The attack is network-based with low complexity, requiring no privileges or user interaction. An attacker can exploit this vulnerability by:

1. Identifying a vulnerable Labkotec LID-3300IP device on the network
2. Crafting malicious packets that mimic legitimate management commands
3. Sending these packets directly to the device's network interface
4. Modifying device parameters or executing operational commands

The vulnerability mechanism involves direct command injection through the unauthenticated network interface. Attackers can modify critical parameters such as detection thresholds, alert settings, or operational modes. For detailed technical information, refer to the CISA ICS Advisory ICSA-26-062-05.

Detection Methods for CVE-2026-1775

Indicators of Compromise

• Unexpected changes to ice detector configuration parameters or operational settings
• Unusual network traffic patterns to/from LID-3300IP devices, particularly on management ports
• Device behavior anomalies such as disabled alerts or modified detection thresholds
• Unauthorized command packets observed in network logs targeting ice detector devices

Detection Strategies

• Implement network intrusion detection signatures for known exploitation patterns targeting Labkotec devices
• Deploy anomaly-based monitoring for unexpected configuration changes on ICS/SCADA networks
• Enable logging on all network traffic to and from ice detector devices for forensic analysis
• Use industrial protocol-aware security tools to detect unauthorized command sequences

Monitoring Recommendations

• Continuously monitor network segments containing LID-3300IP devices for unauthorized access attempts
• Establish baseline configuration snapshots and alert on any deviations
• Implement network segmentation monitoring to detect lateral movement toward ICS assets
• Review device logs regularly for evidence of parameter modifications or command execution

How to Mitigate CVE-2026-1775

Immediate Actions Required

• Isolate affected Labkotec LID-3300IP devices from untrusted networks immediately
• Implement strict network segmentation to limit access to authorized management stations only
• Deploy firewall rules to restrict inbound connections to the ice detector devices
• Conduct a security assessment of all ICS network segments containing vulnerable devices

Patch Information

Organizations should consult the CISA ICS Advisory ICSA-26-062-05 for the latest vendor guidance and patch availability. Contact Labkotec directly for firmware updates or security patches that address this vulnerability.

Workarounds

• Place all LID-3300IP devices behind a properly configured firewall with strict access control lists
• Implement network segmentation to ensure ice detectors are only accessible from authorized management workstations
• Use VPN connections for any remote management access to the affected devices
• Enable network monitoring and alerting for any unauthorized connection attempts to ice detector devices

# Example firewall rule to restrict access to ice detector management interface
# Allow only authorized management station (192.168.10.5) to access device
iptables -A INPUT -s 192.168.10.5 -d 192.168.10.100 -p tcp --dport 502 -j ACCEPT
iptables -A INPUT -d 192.168.10.100 -p tcp --dport 502 -j DROP

# Log all connection attempts for monitoring
iptables -A INPUT -d 192.168.10.100 -j LOG --log-prefix "ICS_ACCESS: "