CVE-2025-67186

Published Feb 3, 2026

Last updated a month ago

CVSS critical 9.8

Overview

Description
TOTOLINK A950RG V4.1.2cu.5204_B20210112 contains a buffer overflow vulnerability in the setUrlFilterRules interface of /lib/cste_modules/firewall.so. The vulnerability occurs because the `url` parameter is not properly validated for length, allowing remote attackers to trigger a buffer overflow, potentially leading to arbitrary code execution or denial of service.
Source
cve@mitre.org
NVD status
Analyzed
Products
a950rg_firmware

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-120

Social media

Hype score
Not currently trending

  1. 🔴 CVE-2025-67186 - Critical TOTOLINK A950RG V4.1.2cu.5204_B20210112 contains a buffer overflow vulnerability in the setUrlFilterRules interface of /lib/cste_modules/firewall.so. The vulnerability occurs because the ... https://t.co/M3DQJiuLJS https://t.co/Nz2V5KrnGo

    @TheHackerWire

    4 Feb 2026

    42 Impressions

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  2. CVE-2025-67186 TOTOLINK A950RG V4.1.2cu.5204_B20210112 contains a buffer overflow vulnerability in the setUrlFilterRules interface of /lib/cste_modules/firewall.so. The vulnerabilit… https://t.co/WyAGgXWvcU

    @CVEnew

    3 Feb 2026

    102 Impressions

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Configurations

Related CVEs

  1. A command injection vulnerability exists in the TOTOLINK A950RG Router firmware V5.9c.4592_B20191022_ALL within the `system.so` binary. The `setDiagnosisCfg` function retrieves the `ipDoamin` parameter from user input via `websGetVar` and concatenates it directly into a `ping` system command executed via `CsteSystem()` without any sanitization. An unauthenticated remote attacker can exploit this vulnerability to execute arbitrary commands on the device through specially crafted HTTP requests to the router's web interface.•CVE-2025-60702
  2. A buffer overflow vulnerability exists in the TOTOLINK A950RG Router firmware V5.9c.4592_B20191022_ALL within the `global.so` binary. The `getSaveConfig` function retrieves the `http_host` parameter from user input via `websGetVar` and copies it into a fixed-size stack buffer (`v13`) using `strcpy()` without performing any length checks. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted HTTP request to the router's web interface, potentially leading to arbitrary code execution.•CVE-2025-60699
  3. In TOTOLink A7100RU V7.4, A950RG V5.9, and T10 V5.9, the chroot_local_user option is enabled in the vsftpd.conf. This could lead to unauthorized access to system files, privilege escalation, or use of the compromised server as a pivot point for internal network attacks.•CVE-2025-44655
  4. A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.•CVE-2025-4496
  5. A command execution vulnerability exists in the TOTOLINK A950RG V4.1.2cu.5204_B20210112. The vulnerability is located in the setNoticeCfg interface within the /lib/cste_modules/system.so library, specifically in the processing of the IpTo parameter.•CVE-2025-45798

References

Sources include official advisories and independent security research.