What’s Vulnerable › Vulnerabilities

CVE-2025-7862: TOTOLINK T6 Telnet Service cstecgi.cgi setTelnetCfg missing authentication

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-20 · updated 2026-06-17
• Weakness: CWE-287

Description

A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument telnet_enabled with the input 1 leads to missing authentication. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Affected products

• TOTOLINK T6: v4.1.5cu.748_b20211015

References

• https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md
• https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http
• https://vuldb.com/?ctiid.316975
• https://vuldb.com/?id.316975
• https://vuldb.com/?submit.617643
• https://www.totolink.net/
• https://www.youtube.com/watch?v=XeKu3tfeSME
• https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md
• https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http
• https://www.youtube.com/watch?v=XeKu3tfeSME

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