Stack-based Buffer Overflow in Tenda F1202 by Tenda
CVE-2026-9428

8.7HIGH

Key Information:

Vendor

Tenda
Status
F1202
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9428?

A vulnerability exists in the Tenda F1202 router, specifically in the fromPPTPUserSetting function located at /goform/PPTPUserSetting. This vulnerability allows for stack-based buffer overflow due to improper handling of the 'delno' argument. Attackers can exploit this vulnerability remotely, potentially compromising the security of the device. The exploit has been made public, emphasizing the need for users to review their device configurations and apply necessary security measures.

Affected Version(s)

F1202 1.2.0.20(408)

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-2026-9428 - Proof of Concept

References

https://vuldb.com/vuln/365409
vdb-entrytechnical-description
https://vuldb.com/vuln/365409/cti
signaturepermissions-required
https://vuldb.com/submit/813911
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

LtzHuster2 (VulDB User)
.