Buffer Overflow Vulnerability in Totolink WA300 by Totolink
CVE-2026-7719

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
Wa300
Vendor
CVE Published:
4 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7719?

A security flaw has been identified in the Totolink WA300 access point, specifically in the 'loginauth' function located in the cstecgi.cgi file of the POST Request Handler. The vulnerability arises from improper handling of the 'http_host' argument, leading to a buffer overflow that can be exploited remotely. This issue allows malicious actors to manipulate system operations, and the exploit details have been publicly released, increasing the risk of potential attacks. Users are advised to take immediate measures to secure their devices.

Affected Version(s)

WA300 5.2cu.7112_B20190227

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-2026-7719 - Proof of Concept

References

https://vuldb.com/vuln/360895
vdb-entrytechnical-description
https://vuldb.com/vuln/360895/cti
signaturepermissions-required
https://vuldb.com/submit/807197
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)
.