CVE-2025-7837

Name: CVE-2025-7837
Creator: NVD / NIST
Published: 2025-07-19T17:15:24.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.98%

Last modified Jun 17, 2026

CVE-2025-7837 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. EPSS estimates a 0.98% chance of exploitation in the next 30 days.

Description

A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. The manipulation of the argument dest 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

0.98%

57.8th 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/4.mdExploit, Third Party Advisory
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/4.md#pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.316940Permissions Required
https://vuldb.com/?id.316940Third Party Advisory, VDB Entry
https://vuldb.com/?submit.617572Third Party Advisory, VDB Entry
https://www.totolink.net/Product

Timeline

Published: Jul 19, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-7837?

How severe is CVE-2025-7837?

CVE-2025-7837 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.

How do I fix CVE-2025-7837?

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-2025-7837?

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

Scan your code now

Source: NVD / NIST