High severity · published Mar 13, 2026
CVE-2026-3557
Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
8.0
CVSS
0.6%
EPSS
No
On KEV
Description
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 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. Was ZDI-CAN-28337.
CVSS vector
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HB
Hue Bridge · Philips
1.73.1973146020 · source: vendor
HB
Hue Bridge V2 Firmware · Philips
before 1975170000 · source: NVD
In the news
VulnerabilityHigh
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 ZDI has assigned a CVSS rating of 8.0. The following CVEs are assigned: CVE-2026-3557.
Mar 6, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3557
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3557
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-155/
More from Hue Bridge
8.8
CVE-2026-3562
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability
8.8
CVE-2026-3560
Philips Hue Bridge HomeKit hk_hap_pair_storage_put Heap-based Buffer Overflow Remote Code Execution Vulnerability
8.8
CVE-2026-3556
Philips Hue Bridge HomeKit Pair-Setup Heap-based Buffer Overflow Remote Code Execution Vulnerability
8.1
CVE-2026-3559
Philips Hue Bridge HomeKit Accessory Protocol Static Nonce Authentication Bypass Vulnerability
8.1
CVE-2026-3558
Philips Hue Bridge HomeKit Accessory Protocol Transient Pairing Mode Authentication Bypass Vulnerability
