CVE-2025-7758

Name: CVE-2025-7758
Creator: NVD / NIST
Published: 2025-07-17T22:15:27.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2025-7758 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability, which was classified as critical, has been found in TOTOLINK T6 up to 4.1.5cu.748_B20211015. Affected by this issue is the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

A vulnerability, which was classified as critical, has been found in TOTOLINK T6 up to 4.1.5cu.748_B20211015. Affected by this issue is the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument ip leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Metrics

CVSS 3.1

8.8/10

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

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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

0.76%

50.6th 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/3.mdExploit, Third Party Advisory
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/3.md#pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.316748Permissions Required
https://vuldb.com/?id.316748Third Party Advisory, VDB Entry
https://vuldb.com/?submit.615734Third Party Advisory, VDB Entry
https://www.totolink.net/Product
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/3.mdExploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2025-7758?

How severe is CVE-2025-7758?

CVE-2025-7758 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2025-7758?

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-2025-7758?

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

Scan your code now

Source: NVD / NIST