Stack-based Buffer Overflow in Tenda AC9 Router
CVE-2026-6016

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac9
Vendor
CVE Published:
10 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6016?

A vulnerability has been identified in the Tenda AC9 router, specifically within the decodePwd function located in the /goform/WizardHandle file of the POST Request Handler. This issue allows attackers to manipulate the WANS argument, leading to a stack-based buffer overflow. The exploit can be executed remotely, posing a significant risk if not addressed. The vulnerability has been publicly disclosed, making affected systems susceptible to various forms of exploitation.

Affected Version(s)

AC9 15.03.02.13

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-2026-6016 - Proof of Concept

References

https://vuldb.com/vuln/356572
vdb-entrytechnical-description
https://vuldb.com/vuln/356572/cti
signaturepermissions-required
https://vuldb.com/submit/791829
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

wxhwxhwxh_mie (VulDB User)
.