Description
Incorrect access control in the getWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain guest Wi-Fi configuration information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Published: 2026-08-28
Score: n/a
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The getWiFiGuestCfg function in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 does not enforce proper access control, allowing an attacker to send a crafted POST request to /cgi-bin/cstecgi.cgi and receive guest Wi‑Fi configuration information, including network names, passwords, and security settings. This information could be used to access the guest network or to target connected devices within the LAN.

Affected Systems

TOTOLINK T6 router running firmware version 4.1.5cu.748_B20211015 is affected. No additional versions or product lines are listed in the provided data.

Risk and Exploitability

The vulnerability permits unauthenticated disclosure of configuration data; however, no publicly available CVSS or EPSS score is provided and the flaw is not listed in the CISA KEV catalog, indicating no confirmed exploitation at this time. Because authentication is not required, any entity with network connectivity to the router could potentially obtain the configuration details.

Generated by OpenCVE AI on August 28, 2026 at 21:40 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install a firmware update that addresses the access‑control flaw
  • Configure the router’s firewall or ACL to block unauthenticated POST requests to /cgi-bin/cstecgi.cgi
  • Change or disable the guest Wi‑Fi network name and password to reduce exposure

Generated by OpenCVE AI on August 28, 2026 at 21:40 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 28 Aug 2026 22:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Access to Guest Wi‑Fi Configuration in TOTOLINK T6
Weaknesses CWE-200
CWE-284

Fri, 28 Aug 2026 21:00:00 +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 getWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain guest Wi-Fi configuration information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
References

Subscriptions

Totolink T6
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-28T17:20:20.676Z

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

Link: CVE-2026-51638

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-08-28T20:18:07.173

Modified: 2026-08-28T21:25:40.287

Link: CVE-2026-51638

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T21:45:03Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-284

    Improper Access Control