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CVE-2025-7862 – “TOTOLINK Telnet Service Remote Authentication Bypass”

The following table lists the changes that have been made to the
CVE-2025-7862 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Jul. 20, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
    Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CWE CWE-287
    Added CWE CWE-306
    Added Reference https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md
    Added Reference https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http
    Added Reference https://vuldb.com/?ctiid.316975
    Added Reference https://vuldb.com/?id.316975
    Added Reference https://vuldb.com/?submit.617643
    Added Reference https://www.totolink.net/
    Added Reference https://www.youtube.com/watch?v=XeKu3tfeSME
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