Description
Incorrect access control in the getSysStatusCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain sensitive information such as operation mode, firmware version, serial number, WAN/LAN IP addresses, WiFi SSID, encryption keys, and connected client statistics via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Published: 2026-08-28
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Patch Firmware
AI Analysis

Impact

The vulnerability is an incorrect access control in the getSysStatusCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. An unauthenticated attacker can obtain sensitive device information such as operation mode, firmware version, serial number, WAN/LAN IP addresses, WiFi SSID, encryption keys, and connected client statistics by sending a crafted POST request to /cgi-bin/cstecgi.cgi.

Affected Systems

TOTOLINK T6 series devices running firmware 4.1.5cu.748_B20211015 are affected.

Risk and Exploitability

The vulnerability can be exploited without authentication by sending a POST request to /cgi-bin/cstecgi.cgi. The CVSS score is 7.5, indicating a high severity vulnerability. The EPSS score is < 1% and the vulnerability is not listed in the CISA KEV catalog. An unauthenticated attacker can read sensitive configuration data; no credentials or special privileges beyond network access to the device are required.

Generated by OpenCVE AI on September 2, 2026 at 06:39 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the device firmware to a version that removes the vulnerable getSysStatusCfg function or strengthens access control for the /cgi-bin/cstecgi.cgi endpoint.
  • Configure the device’s network settings or a perimeter firewall so that the HTTP management interface is only reachable from trusted internal networks or disable it entirely if not needed.
  • Block or filter traffic to the /cgi-bin/cstecgi.cgi CGI endpoint using a firewall or router ACL to prevent unauthorized requests from reaching the device.

Generated by OpenCVE AI on September 2, 2026 at 06:39 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 02 Sep 2026 07:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Information Disclosure via Access Control Bypass in TOTOLINK T6 Firmware

Wed, 02 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Title Unauthorized Access to Sensitive Device Configuration via getSysStatusCfg in TOTOLINK T6
Weaknesses CWE-200

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 28 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
Title Unauthorized Access to Sensitive Device Configuration via getSysStatusCfg in TOTOLINK T6
Weaknesses CWE-200
CWE-284

Fri, 28 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Totolink
Totolink t6
Vendors & Products Totolink
Totolink t6

Fri, 28 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Description Incorrect access control in the getSysStatusCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain sensitive information such as operation mode, firmware version, serial number, WAN/LAN IP addresses, WiFi SSID, encryption keys, and connected client statistics via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
References

Subscriptions

Totolink T6
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-01T16:14:45.650Z

Reserved: 2026-06-08T00:00:00.000Z

Link: CVE-2026-51617

cve-icon Vulnrichment

Updated: 2026-09-01T16:01:35.187Z

cve-icon NVD

Status : Deferred

Published: 2026-08-28T20:18:04.860

Modified: 2026-09-01T17:17:26.167

Link: CVE-2026-51617

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-02T06:45:05Z

Weaknesses