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

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k1.91

Summaryinfo

A vulnerability identified as problematic has been detected in TOTOLINK T6 4.1.5cu.748. Impacted is the function getDdnsStatus of the file /cgi-bin/cstecgi.cgi of the component DDNS. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2026-51623. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in TOTOLINK T6 4.1.5cu.748 and classified as problematic. This issue affects the function getDdnsStatus of the file /cgi-bin/cstecgi.cgi of the component DDNS. 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. The summary by CVE is:

Incorrect access control in the getDdnsStatus function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain DDNS runtime status and public IP information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

The advisory is shared at totolink.net. The identification of this vulnerability is CVE-2026-51623 since 06/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/28/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

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

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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
08/28/2026 +81 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/28/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: totolink.net
Status: Not defined

CVE: CVE-2026-51623 (🔒)
GCVE (CVE): GCVE-0-2026-51623
GCVE (VulDB): GCVE-100-396797

Entryinfo

Created: 08/28/2026 21:49
Changes: 08/28/2026 21:49 (54)
Complete: 🔍
Cache ID: 216::103

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