CVE-2026-3557: (Pwn2Own) Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Philips Hue Bridge happairverifyhandler 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. Was ZDI-CAN-28337.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-3557?
CVE-2026-3557 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix CVE-2026-3557?
To mitigate CVE-2026-3557, ensure your Philips Hue Bridge firmware is updated to the latest version provided by Philips.
Who is affected by CVE-2026-3557?
CVE-2026-3557 affects users of the Philips Hue Bridge that are running unpatched versions.
What type of attack can exploit CVE-2026-3557?
CVE-2026-3557 can be exploited through a heap-based buffer overflow, allowing attackers to execute code remotely.
Is CVE-2026-3557 a local or remote vulnerability?
CVE-2026-3557 is a remote vulnerability, requiring network adjacency for successful exploitation.