Is CVE-2026-123998 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-123998 being exploited in the wild.

How severe is CVE-2026-123998?

High severity, with a CVSS score of 8.3, published 6 November 2026.

Which products and versions are affected?

Hisense VIDAA Smart TV V0000.01.00a.P0220 and earlier.

Is there a fix for CVE-2026-123998?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-123998 attacked?

It is attacked from the adjacent network or over the network, in a network appliance.

Am I affected by CVE-2026-123998?

Check whether you run Hisense VIDAA Smart TV at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-123998: Hisense VIDAA Smart TV authentication bypass in MQTT broker

CVE-2026-123998 · Severity: high · CVSS 8.3 · Published 2026-11-06

Hisense VIDAA Smart TVs contain an authentication weakness in their remote-control MQTT service that accepts default credentials and a 4-digit PIN that can be brute-forced in seconds without rate limiting. A network attacker with access to the TV's LAN segment can control volume, switch inputs, launch apps, and monitor pairing activity, creating particular risk in shared networks like hotels where untrusted users may have network access.

Technologies: Hisense VIDAA Smart TV. Vendors: Hisense.

Quick answers

Is CVE-2026-123998 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-123998 being exploited in the wild.
How severe is CVE-2026-123998?: High severity, with a CVSS score of 8.3, published 6 November 2026.
Which products and versions are affected?: Hisense VIDAA Smart TV V0000.01.00a.P0220 and earlier.
Is there a fix for CVE-2026-123998?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-123998 attacked?: It is attacked from the adjacent network or over the network, in a network appliance.
Am I affected by CVE-2026-123998?: Check whether you run Hisense VIDAA Smart TV at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The MQTT broker on TCP port 36669 accepts publicly documented default credentials and implements a 4-digit pairing PIN (10,000 possible values) with no rate limiting, allowing complete brute-force enumeration in approximately five seconds. Some control actions require no authentication at all. A LAN-adjacent attacker can inject key events, enumerate installed applications, and monitor pairing activity without authentication.

Affected products

Hisense VIDAA Smart TV V0000.01.00a.P0220 and earlier

Timeline

2026-11-06: disclosed

References

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