Stack-based Buffer Overflow in Tenda AC9 Router
CVE-2026-104611

9.4CRITICAL

Key Information:

Vendor: Tenda
Status: Ac9
Vendor: CVE Published:; 2 October 2026

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👾 Exploit Exists🟡 Public PoC

What is CVE-2026-104611?

A vulnerability exists in the Tenda AC9 router, specifically in the POST Request Handler component found at /goform/fast_setting_internet_set. This vulnerability arises when an attacker manipulates the netWanType argument, leading to a stack-based buffer overflow. The exploit can be executed remotely, putting systems at risk of unauthorized access and potential data compromise. Given that the exploit is now public, immediate action is advised to mitigate risks associated with this security flaw.

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-2026-104611 - Proof of Concept