TOTOLINK A702R 4.0.0-B20230721.1521 HTTP POST Request formWlanMultipleAP submit-url buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, was found in TOTOLINK A702R 4.0.0-B20230721.1521. Affected is an unknown function of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. Executing a manipulation of the argument submit-url can lead to buffer overflow. This vulnerability is handled as CVE-2025-8140. The attack can be executed remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects some unknown functionality of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url 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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-8140. The exploitation appears to be easy. The attack can be initiated remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

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

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

Productinfo

Vendor

• TOTOLINK

Name

• A702R

Version

• 4.0.0-B20230721.1521

License

• commercial

Website

• Vendor: https://www.totolink.net/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/24/2025 Advisory disclosed
07/24/2025 +0 days VulDB entry created
07/28/2025 +4 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2025-8140 (🔒)
GCVE (CVE): GCVE-0-2025-8140
GCVE (VulDB): GCVE-100-317536
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/24/2025 18:02
Updated: 07/28/2025 23:31
Changes: 07/24/2025 18:02 (56), 07/28/2025 23:31 (32)
Complete: 🔍
Submitter: panda_0x1
Cache ID: 216::103

Submitinfo

Accepted

• Submit #620486: TOTOLINK A702R V4.0.0-B20230721.1521 Buffer Overflow (by panda_0x1)

Duplicate

• Submit #XXXXXX: Xxxxxxxx Xxxxx Xx.x.x-xxxxxxxxx.xxxx Xxxxxx Xxxxxxxx (by rew1X)

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

Discussion

Want to stay up to date on a daily basis?

Enable the mail alert feature now!