TOTOLINK A800R 4.1.2cu.5137_B20200730 downloadFile.cgi v25 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 marked as critical has been reported in TOTOLINK A800R 4.1.2cu.5137_B20200730. This vulnerability affects unknown code of the file downloadFile.cgi. The manipulation of the argument v25 leads to buffer overflow. This vulnerability is listed as CVE-2025-28020. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730 and classified as critical. This issue affects an unknown code of the file downloadFile.cgi. The manipulation of the argument v25 with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in downloadFile.cgi through the v25 parameter.

It is possible to read the advisory at locrian-lightning-dc7.notion.site. The identification of this vulnerability is CVE-2025-28020 since 03/11/2025. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (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-2025-12101). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

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Version

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 🔍
04/23/2025 +42 days 🔍
04/23/2025 +0 days 🔍
05/25/2025 +32 days 🔍

Sourcesinfo

Vendor: totolink.net

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

CVE: CVE-2025-28020 (🔍)
GCVE (CVE): GCVE-0-2025-28020
GCVE (VulDB): GCVE-100-306023
EUVD: 🔍

Entryinfo

Created: 04/23/2025 21:36
Updated: 05/25/2025 02:19
Changes: 04/23/2025 21:36 (54), 05/25/2025 02:19 (1)
Complete: 🔍
Cache ID: 216::103

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