CVE-2025-7862

Name: CVE-2025-7862
Creator: NVD / NIST
Published: 2025-07-20T03:15:23.773+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2025-7862 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

5.5/10

CVSS:4.0/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

EPSS Probability

0.99%

58.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	T6 Firmware	v4.1.5cu.748_b20211015

References

https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.mdExploit, Third Party Advisory
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-httpExploit, Third Party Advisory
https://vuldb.com/?ctiid.316975Permissions Required
https://vuldb.com/?id.316975Third Party Advisory, VDB Entry
https://vuldb.com/?submit.617643Third Party Advisory, VDB Entry
https://www.totolink.net/Product
https://www.youtube.com/watch?v=XeKu3tfeSMEExploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.mdExploit, Third Party Advisory
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-httpExploit, Third Party Advisory
https://www.youtube.com/watch?v=XeKu3tfeSMEExploit

Timeline

Published: Jul 20, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-7862?

How severe is CVE-2025-7862?

CVE-2025-7862 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2025-7862?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-7862?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST