Advisory Details

March 6th, 2026

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

CVE ID	CVE-2026-3557
CVSS SCORE	8.0, AV:A/AC:L/PR:L/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. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the hap_pair_verify_handler function of the hk_hap 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.
ADDITIONAL DETAILS	Fixed in Bridge v2 Software version 1975170000 https://www.philips-hue.com/en-ca/support/release-notes/bridge
DISCLOSURE TIMELINE	2025-11-18 - Vulnerability reported to vendor 2026-03-06 - Coordinated public release of advisory 2026-03-06 - Advisory Updated
CREDIT	Viettel Cyber Security

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