CVE-2025-6916: t6 Auth Bypass — Exploit

Description

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 leads to missing authentication. The attack needs to be initiated within the local network. The exploit has been disclosed to the public and may be used.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-287 Improper Authentication

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
totolink	t6_firmware	All
totolink	t6	All

References

Exploits

https://github.com/c0nyy/IoT_vuln/blob/main/TOTOLINK%20T6%20Vuln.md https://github.com/c0nyy/IoT_vuln/blob/main/TOTOLINK%20T6%20Vuln.md

Other References

https://vuldb.com/?ctiid.314409 https://vuldb.com/?id.314409 https://vuldb.com/?submit.605101 https://www.totolink.net/

Frequently Asked Questions

What is CVE-2025-6916? +

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 leads to missing authentication. The attack needs to be initiated within the local network. The exploit has been disclosed to the public and may be used. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-6916? +

CVE-2025-6916 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-6916? +

CVE-2025-6916 affects products from totolink, specifically: t6, t6_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6916? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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