Remote Denial of Service in TCL Smart TV UPnP/DLNA Implementation
CVE-2025-55972

7.5HIGH

Key Information:

Vendor

TCL

Status
TCL Smart TV
Vendor
CVE Published:
3 October 2025

What is CVE-2025-55972?

A vulnerability exists in TCL Smart TVs operating with a UPnP/DLNA MediaRenderer implementation, which exposes the device to a remote denial of service attack. Attackers can exploit this flaw by sending a barrage of malformed or oversized SetAVTransportURI SOAP requests to the UPnP control endpoint. This results in the TV becoming unresponsive, crippling all functionalities. Notably, even manual user intervention or rebooting the device does not restore normal operations unless the attack is halted, leaving users vulnerable to prolonged disruptions.

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References

https://www.youtube.com/watch?v=CRik5mp4SW4
https://github.com/Szym0n13k/CVE-2025-55972-Remote-Unauth...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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