Unauthenticated code execution via faulty signature verification
Published Mar 13, 2026 · Updated Mar 13, 2026
Authentication bypass in Philips Hue Bridge 1.73.1973146020 allows network-adjacent attackers to execute arbitrary code. The hk_hap ed25519_sign_open function improperly verifies Ed25519 signatures, but published sources do not disclose the erroneous check or accepted input. Exploitation requires only access to the same network and no authentication or user interaction, and successful use grants code execution on the bridge.
Summary
What happened
Authentication bypass in Philips Hue Bridge 1.73.1973146020 allows network-adjacent attackers to execute arbitrary code. The hk_hap ed25519_sign_open function improperly verifies Ed25519 signatures, but published sources do not disclose the erroneous check or accepted input. Exploitation requires only access to the same network and no authentication or user interaction, and successful use grants code execution on the bridge.
The record
- CVE
- CVE-2026-3562
- Published
- Mar 13, 2026
- Updated
- Mar 13, 2026
- Vendor
- Signify
- Product
- Philips Hue Bridge
- Classifications
- CWE-347, T1210
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 13, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=1.73.1973146020
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Flicker and fall HomeKit exploit chainfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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