Stack-Based Buffer Overflow in Tenda CX12L Router by Tenda
CVE-2026-5684

8.6HIGH

Key Information:

Vendor

Tenda
Status
Cx12l
Vendor
CVE Published:
6 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5684?

A stack-based buffer overflow vulnerability exists in the Tenda CX12L router's webExcptypemanFilter function. By manipulating the 'page' argument within the '/goform/webExcptypemanFilter' endpoint, an attacker with local network access may exploit this issue, potentially leading to remote code execution or denial of service. The vulnerability has been publicly disclosed, making it crucial for administrators to take precautionary measures to safeguard their devices.

Affected Version(s)

CX12L 16.03.53.12

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-2026-5684 - Proof of Concept

References

https://vuldb.com/vuln/355511
vdb-entrytechnical-description
https://vuldb.com/vuln/355511/cti
signaturepermissions-required
https://vuldb.com/submit/792781
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent 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

lv1020 (VulDB User)
.