ZDI 2026-03-06

ZDI-26-155: (Pwn2Own) Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE-2026-3557

Machine-generated analysis · WAYSCloud LLM

The vulnerability involves a heap-based buffer overflow in the hap_pair_verify_handler due to sub-TLV parsing on the Philips Hue Bridge.

Context

The affected component is the Philips Hue Bridge, specifically in the hap_pair_verify_handler function handling sub-TLV parsing. The vulnerability is a heap-based buffer overflow that can be triggered by network-adjacent attackers. Authentication is required but can be bypassed, according to the advisory. The ZDI assigned a CVSS score of 8.0, indicating high severity based on their rating.

Operator considerations

Check: Determine if Philips Hue Bridge devices are present in the environment and identify their firmware versions.

From Zero Day Initiative ↗

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 8.0. The following CVEs are assigned: CVE-2026-3557.

Read the full advisory on ZDI →

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