ZDI-26-964: (Pwn2Own) Philips Hue Bridge HomeKit Accessory Protocol chacha20_decrypt Integer Underflow Remote Code Execution Vulnerability
Source Zero Day Initiative
Not known to be exploited.
Data as of 13 Nov 2026, 20:35 UTC
Rated High by Zero Day Initiative · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
AI-suggested
Until an official fix is available, restrict network access to the Philips Hue Bridge to trusted devices only and monitor for any unusual activity.
Description
A remote code execution vulnerability exists in the Philips Hue Bridge's HomeKit Accessory Protocol due to an integer underflow in the chacha20_decrypt function. This flaw can be exploited by network-adjacent attackers without authentication, potentially allowing arbitrary code execution on affected devices.