Stack-based Buffer Overflow in Tenda AC9 Router
CVE-2026-6015

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac9
Vendor
CVE Published:
10 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6015?

A security vulnerability exists within the Tenda AC9 router's POST Request Handler, specifically in the formQuickIndex function. This vulnerability arises from improper handling of the PPPOEPassword argument, which can result in a stack-based buffer overflow. Attackers can exploit this flaw remotely, potentially allowing them to execute unauthorized commands or gain unauthorized access to system resources. Given that the exploit has been publicly disclosed, it is crucial for users of the affected version to apply security measures and updates promptly.

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-2026-6015 - Proof of Concept

References

https://vuldb.com/vuln/356571
vdb-entrytechnical-description
https://vuldb.com/vuln/356571/cti
signaturepermissions-required
https://vuldb.com/submit/791828
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)
.