CVE-2025-4994

SafeLine · SafeLine SL6/SL6+

SafeLine SL6 and SL6+ elevator emergency intercom systems are susceptible to an authentication bypass, potentially allowing unauthorized administrative control.

Executive summary

An authentication bypass vulnerability in SafeLine SL6 and SL6+ intercom devices poses a significant security risk by granting unauthorized access to critical life-safety infrastructure.

Vulnerability

The device suffers from an authentication bypass flaw, allowing unauthenticated remote or local attackers to circumvent login mechanisms. This grants unauthorized access to the intercom's administrative interface and functional controls.

Business impact

The CVSS score of 8.7 reflects a high severity, particularly given the physical and safety-critical nature of the affected hardware. Unauthorized access could lead to the hijacking of emergency communication lines, creating severe safety risks and operational liability for facility managers.

Remediation

Immediate Action: Apply all available firmware updates provided by SafeLine immediately to remediate the authentication flaw.

Proactive Monitoring: Review access logs for unauthorized attempts to reach administrative web interfaces or management ports on intercom hardware.

Compensating Controls: Isolate intercom management interfaces from public networks using VLANs or VPNs to restrict access to authorized personnel only.

Exploitation status

Public Exploit Available: false

Analyst recommendation

This vulnerability represents a critical risk due to the nature of the hardware involved. Administrators must treat this as a high-priority update and ensure all affected intercom units are patched to prevent unauthorized remote access to safety-critical systems.