What is CVE-2026-123996?

CVE-2026-123996 is a medium-severity vulnerability in Hisense Vidaa, classified under Missing Authentication for Critical Function. CVSS score: 4.6/10. Published 2026-11-06.

How severe is CVE-2026-123996?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Auth bypass in Hisense Vidaa

CVE-2026-123996

Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains a missing authentication vulnerability in the UPnP/DLNA RenderingControl service on TCP port 38400 that allows a LAN-adjacent attacker to issue SetVolume, SetMute, and SelectPreset(FactoryDefaults) commands after a one-time DLNA pairing with no per-command authentication or session token. Attackers can send a continuous loop of unauthenticated commands to override the physical remote, change volume and mute, and reset all picture and audio calibration settings.

Vulnerability class: Broken Authentication

Published 2026-11-06.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.

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)

CWE-306 — Missing Authentication for Critical Function

References

github.com/yehia-mamdouh/Hisense-Smart-TV-Security-Research (technical-description, exploit)
www.vulncheck.com/advisories/hisense-vidaa-smart-tv-upnp-dlna-missing-authentic… (third-party-advisory)

Frequently asked questions

What is CVE-2026-123996?: CVE-2026-123996 is a medium-severity vulnerability in Hisense Vidaa, classified under Missing Authentication for Critical Function. CVSS score: 4.6/10. Published 2026-11-06.
How severe is CVE-2026-123996?: Medium severity. CVSS v3 base score is 4.6 out of 10.