High severity · published Mar 13, 2026
CVE-2026-3562
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability
8.8
CVSS
0.3%
EPSS
No
On KEV
Description
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability. 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. Was ZDI-CAN-28480.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% 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
VulnerabilityMedium
ZDI-26-160: (Pwn2Own) Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability
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 ZDI has assigned a CVSS rating of 6.3. The following CVEs are assigned: CVE-2026-3562.
Mar 6, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3562
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3562
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-160/
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