NCSC launches SilentGlass, a plug-in device to secure HDMI and DisplayPort links

Security Affairs

April 28, 2026 at 7:14 AM

Overview

The UK’s National Cyber Security Centre (NCSC) has introduced SilentGlass, a new security device designed to protect HDMI and DisplayPort connections from potential hardware attacks. This small plug-in device addresses a significant security gap in IT systems, which often overlook the physical connections between computers and monitors. By blocking malicious links, SilentGlass aims to safeguard sensitive information displayed on screens, making it particularly important for organizations that handle confidential data. The device is now available for commercial use globally, emphasizing the importance of securing physical connections in an increasingly digital world.

Key Takeaways

Affected Systems: HDMI and DisplayPort connections
Action Required: Use SilentGlass plug-in device for securing HDMI and DisplayPort links.
Timeline: Newly disclosed

Original Article Summary

NCSC’s SilentGlass blocks malicious HDMI/DisplayPort links, protecting monitors from hardware attacks. Now commercialized for global use. The UK’s National Cyber Security Centre (NCSC) has launched SilentGlass, a new device to protect one of the most overlooked parts of modern IT systems: the physical links between screens and computers. It is a small plug-in security device […]

Impact

HDMI and DisplayPort connections

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

Use SilentGlass plug-in device for securing HDMI and DisplayPort links

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

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