CVE-2025-7862
"TOTOLINK Telnet Service Remote Authentication Bypass"
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.
INFO
Published Date :
July 20, 2025, 3:15 a.m.
Last Modified :
July 23, 2025, 4:27 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-7862.
| URL | Resource |
|---|---|
| https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md | Exploit Third Party Advisory |
| https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http | Exploit Third Party Advisory |
| https://vuldb.com/?ctiid.316975 | Permissions Required |
| https://vuldb.com/?id.316975 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.617643 | Third Party Advisory VDB Entry |
| https://www.totolink.net/ | Product |
| https://www.youtube.com/watch?v=XeKu3tfeSME | Exploit |
| https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md | Exploit Third Party Advisory |
| https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http | Exploit Third Party Advisory |
| https://www.youtube.com/watch?v=XeKu3tfeSME | Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-7862 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-7862
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-7862 vulnerability anywhere in the article.
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.
-
Initial Analysis by [email protected]
Jul. 23, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:o:totolink:t6_firmware:v4.1.5cu.748_b20211015:*:*:*:*:*:*:* OR cpe:2.3:h:totolink:t6:3:*:*:*:*:*:*:* Added Reference Type CISA-ADP: https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md Types: Exploit, Third Party Advisory Added Reference Type VulDB: https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md Types: Exploit, Third Party Advisory Added Reference Type CISA-ADP: https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http Types: Exploit, Third Party Advisory Added Reference Type VulDB: https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http Types: Exploit, Third Party Advisory Added Reference Type VulDB: https://vuldb.com/?ctiid.316975 Types: Permissions Required Added Reference Type VulDB: https://vuldb.com/?id.316975 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.617643 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://www.totolink.net/ Types: Product Added Reference Type CISA-ADP: https://www.youtube.com/watch?v=XeKu3tfeSME Types: Exploit Added Reference Type VulDB: https://www.youtube.com/watch?v=XeKu3tfeSME Types: Exploit -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 22, 2025
Action Type Old Value New Value 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://www.youtube.com/watch?v=XeKu3tfeSME -
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