Buffer Overflow Vulnerability in Totolink N300RH Router Product
CVE-2026-7750

8.7HIGH

Key Information:

Vendor

Totolink
Status
N300rh
Vendor
CVE Published:
4 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7750?

A buffer overflow vulnerability has been identified in the Totolink N300RH router, specifically in the setMacFilterRules function within the POST Request Handler of the /cgi-bin/cstecgi.cgi file. The vulnerability arises from improper handling of the mac_address argument, which allows remote attackers to exploit the flaw. Successful exploitation could lead to unauthorized access or execution of arbitrary code. This vulnerability is now publicly known, raising significant security concerns for users of affected versions.

Affected Version(s)

N300RH 3.2.4-B20220812

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-7750 - Proof of Concept

References

https://vuldb.com/vuln/360925
vdb-entrytechnical-description
https://vuldb.com/vuln/360925/cti
signaturepermissions-required
https://vuldb.com/submit/807204
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

wxhwxhwxh_mie (VulDB User)
.