(Pwn2Own) Philips Hue Bridge hap_pair_setup_handler Heap-based Buffer Overflow Remote Code Execution Vulnerability

November 13th, 2026
ZDI-26-963 ZDI-CAN-28434

CVE ID

CVE-2026-126978

CVSS Score

8.8 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Philips

Affected Products

Hue Bridge

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the HomeKit Accessory Protocol service, which listens on TCP port 8080 by default. When parsing pairing requests, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length, heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device.

Additional Details

Fixed in Bridge v2 Software version 1975170000
https://www.philips-hue.com/en-ca/support/release-notes/bridge


Disclosure Timeline

  • 2026-07-28 - Vulnerability reported to vendor
  • 2026-11-13 - Coordinated public release of advisory
  • 2026-11-13 - Advisory Updated

Credit

Sang Nguyen Thien (@gnas0x0018) and mistsu of Team ANHTUD

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