Is CVE-2026-3556 actively exploited?

No active exploitation of CVE-2026-3556 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3556 be exploited remotely?

Partially. CVE-2026-3556 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-3556?

CVE-2026-3556 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-3556

HIGH

CVE-2026-3556

CWE-122Published: March 16, 2026· Updated: Mar 16, 2026

8.8

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:21.7th

Official Description

Philips Hue Bridge HomeKit Pair-Setup 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. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the hk_hap_pair_storage_put function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the HomeKit service. Was ZDI-CAN-28326.

NVD Source

Technical Analysis

CVE-2026-3556 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.