VDB-360925 · Submit #807204 · CVE-2026-7750

Totolink N300RH 3.2.4-B20220812 POST Request /cgi-bin/cstecgi.cgi setMacFilterRules mac_address buffer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Totolink N300RH 3.2.4-B20220812. It has been classified as critical. This issue affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. This manipulation of the argument mac_address causes buffer overflow. This vulnerability is registered as CVE-2026-7750. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Totolink N300RH 3.2.4-B20220812. It has been declared as critical. Affected by this vulnerability is the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument mac_address 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 at lavender-bicycle-a5a.notion.site. This vulnerability is known as CVE-2026-7750. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at lavender-bicycle-a5a.notion.site. 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.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Totolink

Name

N300RH

Version

3.2.4-B20220812

License

commercial

Website

Vendor: https://www.totolink.net/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.0

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

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

05/03/2026 Advisory disclosed
05/03/2026 +0 days VulDB entry created
05/03/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: lavender-bicycle-a5a.notion.site
Status: Not defined

CVE: CVE-2026-7750 (🔒)
GCVE (CVE): GCVE-0-2026-7750
GCVE (VulDB): GCVE-100-360925
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/03/2026 19:26
Changes: 05/03/2026 19:26 (57)
Complete: 🔍
Submitter: wxhwxhwxh_mie
Cache ID: 216::103

Submitinfo

Accepted

Submit #807204: Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflow (by wxhwxhwxh_mie)