Vulnerability · Published Jun 30, 2025 · Assigned by VulDB

CVE-2025-6916TOTOLINK T6 formLoginAuth.htm Form_Login missing authentication

High 8.8

In plain English

A high-severity missing authentication in T6 from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.9%top 40.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

A vulnerability, which was classified as critical, was found in TOTOLINK T6 4.1.5cu.748_B20211015. This affects the function Form_Login of the file /formLoginAuth.htm. The manipulation of the argument authCode/goURL leads to missing authentication. The attack needs to be initiated within the local network. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	T6	4.1.5cu.748_B20211015

Weakness: CWE-306, CWE-287 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:R

References

VDB-314409 | TOTOLINK T6 formLoginAuth.htm Form_Login missing authentication vdb-entry, technical-description
VDB-314409 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #605101 | TOTOLINK T6 V4.1.5cu.748_B20211015 Authorization Bypass Through User-Controlled Key third-party-advisory
https://github.com/c0nyy/IoT_vuln/blob/main/TOTOLINK%20T6%20Vuln.md exploit
https://www.totolink.net/ product