TOTOLINK T6 4.1.5cu.748 /cgi-bin/cstecgi.cgi SystemSettings access control

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.
5.3$0-$5k0.00+

Summaryinfo

A vulnerability was found in TOTOLINK T6 4.1.5cu.748 and classified as problematic. This affects the function SystemSettings of the file /cgi-bin/cstecgi.cgi. Such manipulation leads to access control. This vulnerability is traded as CVE-2026-51727. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in TOTOLINK T6 4.1.5cu.748. It has been rated as problematic. Affected by this issue is the function SystemSettings of the file /cgi-bin/cstecgi.cgi. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality. CVE summarizes:

Incorrect access control in the SystemSettings function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to retrieve administrative import and export endpoint information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

The advisory is available at totolink.net. This vulnerability is handled as CVE-2026-51727 since 06/08/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/31/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/08/2026 CVE reserved
08/31/2026 +84 days Advisory disclosed
08/31/2026 +0 days VulDB entry created
08/31/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: totolink.net
Status: Not defined

CVE: CVE-2026-51727 (🔒)
GCVE (CVE): GCVE-0-2026-51727
GCVE (VulDB): GCVE-100-397394

Entryinfo

Created: 08/31/2026 19:37
Changes: 08/31/2026 19:37 (53)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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