How severe is CVE-2026-3558?

CVE-2026-3558 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-3558 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3558?

CVE-2026-3558 affects Philips Hue Bridge V2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3558?

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-2026-3558 have an EU (EUVD) identifier?

Yes. CVE-2026-3558 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12159.

When was CVE-2026-3558 published?

CVE-2026-3558 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-3558

CVE-2026-3558 is a high-severity vulnerability in Philips Hue Bridge V2 Firmware with a CVSS 3.x base score of 8.1. 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-306.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12159
Weakness: CWE-306
Affected product: Philips Hue Bridge V2 Firmware
Published: 2026-03-16
Last modified: 2026-06-17

Description

Philips Hue Bridge HomeKit Accessory Protocol Transient Pairing Mode Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of the HomeKit Accessory Protocol service, which listens on TCP port 8080 by default. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-28374.

Frequently asked questions

What is CVE-2026-3558?: Philips Hue Bridge HomeKit Accessory Protocol Transient Pairing Mode Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of the HomeKit Accessory Protocol service, which listens on TCP port 8080 by default. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-28374.
How severe is CVE-2026-3558?: CVE-2026-3558 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-3558 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3558?: CVE-2026-3558 affects Philips Hue Bridge V2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3558?: 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-2026-3558 have an EU (EUVD) identifier?: Yes. CVE-2026-3558 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12159.
When was CVE-2026-3558 published?: CVE-2026-3558 was published on 2026-03-16 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-156/

Affected products (1)

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

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