Buffer Overflow Vulnerability in Tenda AC1206 Router's Web Management Interface
CVE-2026-19789

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac1206
Vendor
CVE Published:
14 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19789?

A security flaw exists in the Tenda AC1206 router's web management interface, specifically within the function set_wl_guest_iplist located in /goform/WifiGuestSet. This vulnerability allows for a stack-based buffer overflow due to improper handling of the shareSpeed argument. Successful exploitation could enable remote attackers to manipulate the device's functionality, posing substantial risks to users. Publicly disclosed exploits for this vulnerability may allow unauthorized access or control over affected devices, making prompt awareness and mitigation imperative.

Affected Version(s)

AC1206 15.03.06.23_multi_TD01

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-2026-19789 - Proof of Concept

References

https://vuldb.com/vuln/389756
vdb-entrytechnical-description
https://vuldb.com/vuln/389756/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19789
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

stksgg (VulDB User)
.