Stack-Based Buffer Overflow in TOTOLINK A7000R Router
CVE-2026-6168

8.7HIGH

Key Information:

Vendor

Totolink
Status
A7000r
Vendor
CVE Published:
13 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6168?

A vulnerability has been identified in the TOTOLINK A7000R router, specifically within the function setWiFiEasyGuestCfg located in the /cgi-bin/cstecgi.cgi file. This vulnerability allows an attacker to exploit a stack-based buffer overflow by manipulating the ssid5g argument. Such an exploit poses a significant risk, enabling remote attackers to compromise the device's memory, which may lead to unauthorized access or full control over the router's functions. Security measures should be prioritized to mitigate potential exploitation.

Affected Version(s)

A7000R 9.1.0u.6115

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-2026-6168 - Proof of Concept

References

https://vuldb.com/vuln/357056
vdb-entrytechnical-description
https://vuldb.com/vuln/357056/cti
signaturepermissions-required
https://vuldb.com/submit/797193
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

DLChen (VulDB User)
.