ZDI-CAN-28337: ZDI-26-155: (Pwn2Own) Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
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 specific flaw exists within the happairverifyhandler function of the hkhap service, 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 root.
Other sources
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.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-28337?
ZDI-CAN-28337 is classified as a High severity vulnerability due to its potential for remote code execution.
How do I fix ZDI-CAN-28337?
To fix ZDI-CAN-28337, ensure that your Philips Hue Bridge firmware is updated to the latest version provided by Philips.
Who is affected by ZDI-CAN-28337?
ZDI-CAN-28337 affects users of the Philips Hue Bridge who have not patched their devices against this vulnerability.
What type of attack does ZDI-CAN-28337 enable?
ZDI-CAN-28337 enables network-adjacent attackers to execute arbitrary code on the affected Philips Hue Bridge installations.
What component is vulnerable in ZDI-CAN-28337?
The vulnerable component in ZDI-CAN-28337 is the hap_pair_verify_handler used for Sub-TLV parsing.