Buffer Overflow Vulnerability in Totolink N300RH Router
CVE-2026-7747

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
N300rh
Vendor
CVE Published:
4 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7747?

A buffer overflow vulnerability exists in the loginauth function of the Parameter Handler component in Totolink N300RH routers running firmware version 3.2.4-B20220812. This flaw can be exploited remotely by manipulating the Password argument, leading to potential unauthorized access and adverse effects on the device. The vulnerability has been made public, enabling attackers to exploit it, highlighting the urgent need for users to secure their devices.

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-2026-7747 - Proof of Concept

References

https://vuldb.com/vuln/360922
vdb-entrytechnical-description
https://vuldb.com/vuln/360922/cti
signaturepermissions-required
https://vuldb.com/submit/807201
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
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)
.