VDB-314409 · Submit #605101 · CVE-2025-6916

TOTOLINK T6 4.1.5cu.748_B20211015 /formLoginAuth.htm Form_Login authCode/goURL missing authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in TOTOLINK T6 4.1.5cu.748_B20211015. The impacted element is the function Form_Login of the file /formLoginAuth.htm. Performing a manipulation of the argument authCode/goURL results in missing authentication. This vulnerability is cataloged as CVE-2025-6916. The attack must originate from the local network. Furthermore, there is an exploit available. It is suggested to use restrictive firewalling.

Detailsinfo

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 with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-6916. The exploitability is told to be easy. The attack needs to be initiated within the local network. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. By approaching the search of inurl:formLoginAuth.htm it is possible to find vulnerable targets with Google Hacking.

It is possible to mitigate the weakness by firewalling .

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-19554). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

TOTOLINK

Name

Version

4.1.5cu.748_B20211015

License

commercial

Website

Vendor: https://www.totolink.net/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.3

VulDB Base Score: 8.8
VulDB Temp Score: 7.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Google Hack: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/29/2025 Advisory disclosed
06/29/2025 +0 days VulDB entry created
07/07/2025 +8 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2025-6916 (🔒)
GCVE (CVE): GCVE-0-2025-6916
GCVE (VulDB): GCVE-100-314409
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/29/2025 14:21
Updated: 07/07/2025 18:42
Changes: 06/29/2025 14:21 (57), 07/01/2025 02:57 (1), 07/01/2025 10:19 (30), 07/07/2025 18:42 (1)
Complete: 🔍
Submitter: c0nyy
Cache ID: 216::103

Submitinfo

Accepted

Submit #605101: TOTOLINK T6 V4.1.5cu.748_B20211015 Authorization Bypass Through User-Controlled Key (by c0nyy)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.