What is CVE-2026-123997?

CVE-2026-123997 is a medium-severity vulnerability in Hisense Vidaa, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-11-06.

How severe is CVE-2026-123997?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Hisense Vidaa

CVE-2026-123997

Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an unauthenticated denial-of-service vulnerability in the UPnP/DLNA AVTransport SOAP service that allows LAN-adjacent attackers to freeze the entire television software layer by sending a crafted SetAVTransportURI request on TCP port 38400. Attackers can exploit this flaw without credentials to render the device completely unresponsive to remote control or front-panel input, requiring a physical power cycle to restore functionality.

Published 2026-11-06.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (7.1th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Hisense Vidaa — versions 0000.01.00a.P0220

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/yehia-mamdouh/Hisense-Smart-TV-Security-Research (technical-description, exploit)
www.vulncheck.com/advisories/hisense-vidaa-smart-tv-unauthenticated-dos-via-set… (third-party-advisory)

Frequently asked questions

What is CVE-2026-123997?: CVE-2026-123997 is a medium-severity vulnerability in Hisense Vidaa, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-11-06.
How severe is CVE-2026-123997?: Medium severity. CVSS v3 base score is 6.5 out of 10.