(Pwn2Own) Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability
March 6th, 2026
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 ed25519_sign_open function. The issue results from improper verification of a cryptographic signature. An attacker can leverage this vulnerability to bypass authentication on the system.
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
