ZDI-26-157: (Pwn2Own) Philips Hue Bridge HomeKit Accessory Protocol Static Nonce Authentication Bypass Vulnerability
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of the SRP authentication mechanism in the HomeKit Accessory Protocol service, which listens on TCP port 8080 by default. The issue results from the use of a static nonce value. An attacker can leverage this vulnerability to bypass authentication on the system.
Other sources
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.1. The following CVEs are assigned: CVE-2026-3559.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-26-157?
The severity of ZDI-26-157 is high due to the potential for unauthenticated remote exploitation.
How do I fix ZDI-26-157?
To fix ZDI-26-157, update your Philips Hue Bridge to the latest firmware version provided by Philips.
Which devices are affected by ZDI-26-157?
ZDI-26-157 specifically affects Philips Hue Bridge installations.
What type of attack does ZDI-26-157 enable?
ZDI-26-157 enables network-adjacent attackers to bypass authentication on the affected Philips Hue Bridge.
Is authentication required to exploit ZDI-26-157?
No, ZDI-26-157 can be exploited without any authentication.