Buffer Overflow Vulnerability in Tenda AC8 Router
CVE-2026-2202

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac8
Vendor
CVE Published:
9 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2202?

A buffer overflow vulnerability exists in the Tenda AC8 router, specifically in the 'fromSetWifiGusetBasic' function of the '/goform/WifiGuestSet' component. The flaw is triggered by improper handling of the 'shareSpeed' argument, which allows an attacker to execute arbitrary code remotely. The exploit has been disclosed publicly, raising concerns regarding the potential for unauthorized access to the device and network.

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Affected Version(s)

AC8 16.03.33.05

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-2026-2202 - Proof of Concept

References

https://vuldb.com/?id.344905
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344905
signaturepermissions-required
https://vuldb.com/?submit.750225
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

sunnyyaya (VulDB User)
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