EUVD-2026-12158Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessConnect to Hue Bridge TCP port 8080
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DeliveryBypass authentication mechanism
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ExploitSend malformed Sub-TLV data
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ExecutionTrigger heap buffer overflow
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ImpactExecute arbitrary code
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Network-adjacent access to Philips Hue Bridge hk_hap service on TCP port 8080; authentication mechanism present but bypassable; hap_pair_verify_handler processes unvalidated user-supplied Sub-TLV length fields |
| Impact | While the CVSS 8.0 score indicates high severity, the real-world risk requires nuanced assessment. The attack vector is Adjacent Network (AV:A), meaning attackers need local network access, not internet access. Attack complexity is Low (AC:L) and requires Low privileges (PR:L), though the authentication bypass mentioned increases risk. No EPSS score, KEV listing, or public PoC exists, suggesting this is not actively exploited. The SSVC framework would likely categorize this as 'Attend' priority - high technical impact (root RCE) but limited by network-adjacent requirement and lack of observed exploitation. |
| Exploit ScenarioDerived | An attacker on the same network as the Philips Hue Bridge (e.g., compromised IoT device, malicious insider, or guest network access) could send specially crafted requests to TCP port 8080. By exploiting the authentication bypass and sending malformed Sub-TLV data to the hap_pair_verify_handler function, they could overflow the heap buffer, gain code execution as root, and potentially pivot to other smart home devices or use the bridge as a persistent foothold in the network. No public PoC exists, requiring custom exploit development. |
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Alert meAnalysisAIv1 – Mar 13, 2026
Heap-based buffer overflow vulnerability in Philips Hue Bridge devices that allows network-adjacent attackers with authentication (which can be bypassed) to achieve remote code execution as root. The vulnerability affects the HomeKit Accessory Protocol (HAP) implementation on TCP port 8080 and has a high CVSS score of 8.0, though no active exploitation or public PoC has been reported.
RemediationAI
No patch information or fixed versions are available in the provided references. The only reference is to the Zero Day Initiative advisory (ZDI-26-155) which may contain additional details but is not accessible in this data. Organizations should monitor Philips security advisories for patches, consider network segmentation to limit adjacent network access to Hue Bridges, and potentially disable HomeKit integration if not required until a patch is available.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The vulnerability exists in the hap_pair_verify_handler function within the hk_hap service, which implements Apple's HomeKit Accessory Protocol for smart home integration. According to the CPE data (cpe:2.3:a:philips:hue_bridge:*:*:*:*:*:*:*:*), all versions of Philips Hue Bridge are affected. This is a classic heap buffer overflow (CWE-122) where the application fails to validate the length of user-supplied Sub-TLV (Type-Length-Value) data before copying it to a heap buffer, allowing memory corruption and arbitrary code execution.
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Severity by source
AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
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.
Zero Day Initiative Advisories
Executive ViewAI
CVE-2026-3557 is a critical remote code execution vulnerability affecting Philips Hue Bridge devices that could allow attackers to gain complete control of smart home infrastructure and connected networks. While no patch is currently available and active exploitation is not yet documented, organizations deploying Hue Bridge devices face significant risk to operational continuity and data security if the vulnerability is weaponized.
Implement network segmentation isolating Hue Bridge devices on a dedicated VLAN with restrictive firewall rules; disable or restrict access to TCP port 8080 to authorized devices only; deploy Web Application Firewall (WAF) or network-based IDS/IPS rules monitoring for buffer overflow attack patterns on port 8080; disable HomeKit Accessory Protocol functionality if the feature is not operationally required; enforce strong authentication mechanisms for any remaining HAP access; implement continuous network monitoring and alerting for suspicious connections to affected devices; consider temporary shutdown of Hue Bridge devices until patch availability is confirmed.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
GitHub PoC
Exploit-DB