CVE-2026-3560: Philips Hue Bridge RCE Vulnerability

CVE-2026-3560 Overview

CVE-2026-3560 is a heap-based buffer overflow vulnerability affecting the Philips Hue Bridge HomeKit implementation. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge devices without requiring authentication.

The specific flaw exists within the hk_hap_pair_storage_put function of the HomeKit implementation, which listens on TCP port 8080 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device.

Critical Impact

Network-adjacent attackers can achieve full remote code execution on Philips Hue Bridge devices without authentication, potentially compromising the entire smart home network.

Affected Products

• Philips Hue Bridge (HomeKit-enabled versions)
• Devices running the vulnerable hk_hap_pair_storage_put function
• HomeKit implementations listening on TCP port 8080

Discovery Timeline

• 2026-03-16 - CVE CVE-2026-3560 published to NVD
• 2026-03-16 - Last updated in NVD database

Technical Details for CVE-2026-3560

Vulnerability Analysis

This vulnerability is classified as CWE-122 (Heap-based Buffer Overflow). The flaw resides in the HomeKit pairing storage functionality, specifically within the hk_hap_pair_storage_put function. When processing pairing data, the function fails to properly validate the length of user-supplied input before copying it into a fixed-size heap buffer.

The attack vector requires network adjacency, meaning an attacker must be on the same local network segment as the vulnerable Philips Hue Bridge device. However, no authentication is required to exploit this vulnerability, significantly lowering the barrier to successful exploitation. The vulnerability was tracked by the Zero Day Initiative as ZDI-CAN-28469 and published as ZDI-26-158.

Root Cause

The root cause is improper validation of user-supplied data length in the hk_hap_pair_storage_put function. The HomeKit implementation accepts pairing data from network clients on TCP port 8080 without performing adequate bounds checking. When an attacker supplies data exceeding the expected buffer size, the function copies this oversized data into a heap-allocated buffer, corrupting adjacent memory structures.

This type of heap corruption can be leveraged by skilled attackers to gain arbitrary code execution by overwriting heap metadata or function pointers stored in adjacent memory regions.

Attack Vector

The attack is conducted over the adjacent network via TCP port 8080, which hosts the HomeKit service. An attacker on the same network segment can send specially crafted pairing requests containing oversized data to the hk_hap_pair_storage_put function. The lack of authentication means any device on the local network can attempt exploitation.

The vulnerability allows attackers to execute arbitrary code in the context of the device, potentially gaining full control over the Philips Hue Bridge. This could enable attackers to pivot to other devices on the smart home network, intercept communications, or use the compromised device as a foothold for further attacks.

Detection Methods for CVE-2026-3560

Indicators of Compromise

• Unusual network traffic patterns to TCP port 8080 on Philips Hue Bridge devices
• Unexpected crashes or restarts of Philips Hue Bridge devices
• Anomalous memory usage or process behavior on IoT network segments
• Large or malformed pairing requests sent to HomeKit services

Detection Strategies

• Monitor network traffic for oversized or malformed packets destined for TCP port 8080 on Philips Hue Bridge devices
• Implement network segmentation monitoring to detect unauthorized communication with IoT devices
• Deploy intrusion detection signatures targeting heap overflow exploitation patterns in HomeKit traffic
• Use network anomaly detection to identify unusual pairing request volumes or sizes

Monitoring Recommendations

• Isolate IoT devices including Philips Hue Bridge on separate network segments with strict access controls
• Enable logging on network firewalls to capture traffic to/from smart home devices
• Implement continuous monitoring of TCP port 8080 traffic patterns on the local network
• Review device logs for unusual pairing attempts or service crashes

How to Mitigate CVE-2026-3560

Immediate Actions Required

• Segment Philips Hue Bridge devices onto isolated network VLANs with restricted access
• Block or restrict access to TCP port 8080 from untrusted network segments
• Monitor for and apply firmware updates from Philips as they become available
• Audit local network access to ensure only trusted devices can reach the Hue Bridge

Patch Information

At the time of publication, refer to Zero Day Initiative Advisory ZDI-26-158 for the latest patch status and vendor response. Monitor Philips official channels for firmware updates addressing this vulnerability.

Workarounds

• Implement network segmentation to isolate IoT devices from general network traffic
• Configure firewall rules to restrict access to TCP port 8080 on Philips Hue Bridge devices
• Disable HomeKit functionality if not required until a patch is available
• Limit local network access using MAC address filtering or similar controls

# Example firewall rule to restrict access to Hue Bridge HomeKit port
# Replace HUE_BRIDGE_IP with your device's IP address
iptables -A FORWARD -d HUE_BRIDGE_IP -p tcp --dport 8080 -j DROP
iptables -A FORWARD -s TRUSTED_DEVICE_IP -d HUE_BRIDGE_IP -p tcp --dport 8080 -j ACCEPT