Stack-Based Buffer Overflow in Tenda CX12L Router
CVE-2026-5685

8.7HIGH

Key Information:

Vendor

Tenda
Status
Cx12l
Vendor
CVE Published:
6 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5685?

A stack-based buffer overflow vulnerability has been discovered in the Tenda CX12L router version 16.03.53.12, specifically within the fromAddressNat function located in the /goform/addressNat file. This flaw allows an attacker to remotely manipulate the argument page, potentially leading to exploitation due to insufficient input validation. With the exploit details publicly accessible, it is crucial for users to mitigate risks by updating their devices and following best cybersecurity practices.

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-2026-5685 - Proof of Concept

References

https://vuldb.com/vuln/355512
vdb-entrytechnical-description
https://vuldb.com/vuln/355512/cti
signaturepermissions-required
https://vuldb.com/submit/792782
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

lv1020 (VulDB User)
.