Access Control Flaw in TOTOLINK Router Software Exposes Sensitive Firmware Information
CVE-2026-51671

7.5HIGH

Key Information:

Vendor

TOTOLINK
Status
T6 Router
Vendor
CVE Published:
31 August 2026

What is CVE-2026-51671?

An access control vulnerability in the getCloudDownloadStatus function of the TOTOLINK T6 allows unauthorized users to exploit this flaw. This vulnerability enables attackers to send specially crafted POST requests to the /cgi-bin/cstecgi.cgi endpoint. By doing so, they can obtain sensitive information about the cloud firmware download status, posing significant risks to device integrity and user security.

References

https://www.totolink.net/home/menu/detail/menu_listtpl/do...
https://www.totolink.net/
https://github.com/DarkBoulder/CVE-Vendor-Coordination/bl...

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.