CVE-2025-4850 - CVE House

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Status published Medium CVE-2025-4850

TOTOLINK N300RH cstecgi.cgi setUnloadUserData command injection

5.3 CVSS

Vulnerability Description

A vulnerability classified as critical has been found in TOTOLINK N300RH 6.1c.1390_B20191101. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

DaddyShark (VulDB User)

References

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TOTOLINK A702R formOneKeyAccessButton sub_4466F8 buffer overflow

TOTOLINK A702R formFilter sub_4162DC buffer overflow

Affected Vendor

TOTOLINK

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Affected Software

N300RH

Vulnerable Versions:

6.1c.1390_B20191101

Timeline

Official Publish: May 18th, 2025

Last Modified: May 19th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1059 Command and Scripting Interpreter

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1105 Ingress Tool Transfer

Command and Control

T1562 Impair Defenses

Defense Evasion

T1213 Data from Information Repositories