Auth bypass in Hisense Vidaa
CVE-2026-123993
Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an unauthenticated access vulnerability where a QA build of the Google Cobalt browser engine exposes the WebDriver automation server on TCP port 4444 across all network interfaces without any authentication or pairing requirement. A LAN-adjacent attacker can connect to the exposed WebDriver service to execute arbitrary JavaScript, read and exfiltrate sensitive localStorage data including ACR telemetry, MAC addresses, ad-service credentials, and location data, inject persistent content onto the display, and access the window.hisense native bridge to perform filesystem read/write and system-state operations.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Hisense Vidaa — versions 0000.01.00a.P0220
Weakness classification (CWE)
References
- Researcher Disclosure (technical-description, exploit)
- VulnCheck Advisory: Hisense VIDAA Smart TV Unauthenticated WebDriver Remote Access (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123993?
- CVE-2026-123993 is a high-severity vulnerability in Hisense Vidaa, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2026-11-06.
- How severe is CVE-2026-123993?
- High severity. CVSS v3 base score is 8.8 out of 10.