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Vulnerability record · CVE-2025-67186 · published 3 February 2026

CVE-2025-67186: Totolink a950rg firmware classic buffer overflow vulnerability

TTotolink · A950rg Firmware

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.

9.8 CVSS 3.1 Critical EPSS 0.74% · top 47.3% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A950RG/5024-setUrlFliterRules-url-buffer.m ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-67187Totolink a950rg firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability was identified in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The flaw exists in the setIpQosRules interface…EPSS 0.47%9.8CVE-2025-67188Totolink a950rg firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability exists in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The issue resides in the setRadvdCfg interface of the /lib/cste_mo…EPSS 0.65%9.8CVE-2025-44655Totolink a7100ru firmware vulnerabilityIn 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 acce…EPSS 0.34%9.8CVE-2025-45797Totolink a950rg firmware out-of-bounds write vulnerabilityTOTOlink A950RG V4.1.2cu.5204_B20210112 contains a buffer overflow vulnerability. The vulnerability arises from the improper input validation of the …EPSS 17%9.8CVE-2025-45798Totolink a950rg firmware command injection vulnerabilityA command execution vulnerability exists in the TOTOLINK A950RG V4.1.2cu.5204_B20210112. The vulnerability is located in the setNoticeCfg interface w…EPSS 1.2%9.8CVE-2025-45800Totolink a950rg firmware command injection vulnerabilityTOTOLINK A950RG V4.1.2cu.5204_B20210112 contains a command execution vulnerability in the setDeviceName interface of the /lib/cste_modules/global.so …EPSS 0.86%9.8CVE-2025-28035Totolink a830r firmware os command injection vulnerabilityTOTOLINK A830R V4.1.2cu.5182_B20201102 was found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through th…EPSS 1.3%9.8CVE-2025-28036Totolink a950rg firmware os command injection vulnerabilityTOTOLINK A950RG V4.1.2cu.5161_B20200903 was found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through t…EPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2025-67186), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.