TOTOLINK A950RG 4.1.2cu.5204_B20210112 Firewall.so seturlFilterRules url buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in TOTOLINK A950RG 4.1.2cu.5204_B20210112. This affects the function seturlFilterRules of the file /lib/cste_modules/Firewall.so. Performing a manipulation of the argument url results in buffer overflow. This vulnerability is identified as CVE-2025-67186. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in TOTOLINK A950RG 4.1.2cu.5204_B20210112. It has been classified as critical. This affects the function seturlFilterRules of the file /lib/cste_modules/Firewall.so. The manipulation of the argument url with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-67186 since 12/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/10/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 9.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 9.8
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

12/08/2025 CVE reserved
02/03/2026 +57 days Advisory disclosed
02/03/2026 +0 days VulDB entry created
02/10/2026 +7 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2025-67186 (🔒)
GCVE (CVE): GCVE-0-2025-67186
GCVE (VulDB): GCVE-100-344121

Entryinfo

Created: 02/03/2026 21:23
Updated: 02/10/2026 15:24
Changes: 02/03/2026 21:23 (55), 02/10/2026 15:24 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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