CVE-2025-7952Public exploitNetwork attack vector

Remote command execution via MQTT ipAddr injection

Published Jul 22, 2025 · Updated Jul 22, 2025

Command injection in TOTOLINK T6 firmware 4.1.5cu.748 allows remote authenticated users to execute commands via crafted MQTT packets. The wireless.so ckeckKeepAlive handler passes the MQTT ipAddr value through safe_cs_pub to tcpcheck_net, which embeds it in a tcpcheck system call without neutralizing command delimiters. Exploitation requires a nonzero mesh setting, an existing /var/meshInfo.ini file, and a valid MAC address; the published MQTT procedure creates the first two conditions remotely.

CVSS severity6.3
Medium
EPSS probability18.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in TOTOLINK T6 firmware 4.1.5cu.748 allows remote authenticated users to execute commands via crafted MQTT packets. The wireless.so ckeckKeepAlive handler passes the MQTT ipAddr value through safe_cs_pub to tcpcheck_net, which embeds it in a tcpcheck system call without neutralizing command delimiters. Exploitation requires a nonzero mesh setting, an existing /var/meshInfo.ini file, and a valid MAC address; the published MQTT procedure creates the first two conditions remotely.

The record

CVE
CVE-2025-7952
Published
Jul 22, 2025
Updated
Jul 22, 2025
Vendor
TOTOLINK
Product
T6
Classifications
CWE-77, CWE-74, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1.5cu.748

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · T6version=4.1.5cu.748

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo