How severe is CVE-2026-3555?

CVE-2026-3555 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-3555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3555?

CVE-2026-3555 affects Philips Hue Bridge V2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3555?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-3555 have an EU (EUVD) identifier?

Yes. CVE-2026-3555 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12156.

When was CVE-2026-3555 published?

CVE-2026-3555 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-3555

CVE-2026-3555 is a high-severity vulnerability in Philips Hue Bridge V2 Firmware with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12156
Weakness: CWE-122
Affected product: Philips Hue Bridge V2 Firmware
Published: 2026-03-16
Last modified: 2026-06-17

Description

Philips Hue Bridge Zigbee Stack Custom Command Handler 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. User interaction is required to exploit this vulnerability in that the user must initiate the device pairing process. The specific flaw exists within the handling of custom Zigbee ZCL frames in the Model Info download functionality. The issue results from the lack of proper validation of the size of data prior to copying it to a fixed-size heap buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-28276.

Frequently asked questions

What is CVE-2026-3555?: Philips Hue Bridge Zigbee Stack Custom Command Handler 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. User interaction is required to exploit this vulnerability in that the user must initiate the device pairing process. The specific flaw exists within the handling of custom Zigbee ZCL frames in the Model Info download functionality. The issue results from the lack of proper validation of the size of data prior to copying it to a fixed-size heap buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-28276.
How severe is CVE-2026-3555?: CVE-2026-3555 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-3555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3555?: CVE-2026-3555 affects Philips Hue Bridge V2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-3555 have an EU (EUVD) identifier?: Yes. CVE-2026-3555 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12156.
When was CVE-2026-3555 published?: CVE-2026-3555 was published on 2026-03-16 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-153/

Affected products (1)

cpe:2.3:o:philips:hue_bridge_v2_firmware:*:*:*:*:*:*:*:*

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