CVE-2026-3558

Authentication bypass via unauthenticated transient pairing mode

Published Mar 13, 2026 · Updated Mar 13, 2026

Authentication bypass in Philips Hue Bridge 1.73.1973146020 allows network-adjacent attackers to access HomeKit functions without credentials. The HomeKit Accessory Protocol service on TCP port 8080 enables transient pairing mode without authenticating the requester before exposing protected functionality. The attacker must reach the Bridge from an adjacent network; the flaw permits unauthorized access and modification but no reported service interruption.

CVSS severity8.1
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Philips Hue Bridge 1.73.1973146020 allows network-adjacent attackers to access HomeKit functions without credentials. The HomeKit Accessory Protocol service on TCP port 8080 enables transient pairing mode without authenticating the requester before exposing protected functionality. The attacker must reach the Bridge from an adjacent network; the flaw permits unauthorized access and modification but no reported service interruption.

The record

CVE
CVE-2026-3558
Published
Mar 13, 2026
Updated
Mar 13, 2026
Vendor
Signify
Product
Philips Hue Bridge
Classifications
CWE-306
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.73.1973146020

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Signify · Philips Hue Bridgeversion=1.73.1973146020

Published CVSS scores

8.1Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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