TOTOLINK A830R/A950RG/A3000RU/A3100R downloadFile.cgi buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$0-$5k0.00

Summaryinfo

A vulnerability was found in TOTOLINK A830R, A950RG, A3000RU and A3100R. It has been declared as critical. Affected is an unknown function of the file downloadFile.cgi. Executing a manipulation can lead to buffer overflow. This vulnerability is registered as CVE-2025-28027. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in TOTOLINK A830R, A950RG, A3000RU and A3100R (version now known). This vulnerability affects some unknown processing of the file downloadFile.cgi. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

TOTOLINK A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 was found to contain a buffer overflow vulnerability in downloadFile.cgi.

The advisory is shared for download at locrian-lightning-dc7.notion.site. This vulnerability was named CVE-2025-28027 since 03/11/2025. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/25/2025).

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-12210). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

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

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

03/11/2025 🔍
04/22/2025 +41 days 🔍
04/22/2025 +0 days 🔍
05/25/2025 +33 days 🔍

Sourcesinfo

Vendor: totolink.net

Advisory: locrian-lightning-dc7.notion.site
Status: Not defined

CVE: CVE-2025-28027 (🔍)
GCVE (CVE): GCVE-0-2025-28027
GCVE (VulDB): GCVE-100-305920
EUVD: 🔍

Entryinfo

Created: 04/22/2025 20:52
Updated: 05/25/2025 04:21
Changes: 04/22/2025 20:52 (52), 05/25/2025 04:21 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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