Stack-Based Buffer Overflow in Tenda F1202 Router
CVE-2026-9429

8.7HIGH

Key Information:

Vendor

Tenda
Status
F1202
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9429?

A stack-based buffer overflow vulnerability has been identified in Tenda F1202 routers, specifically in the formWrlExtraSet function located in the /goform/WrlExtraSet file. By manipulating the delno argument, an attacker can exploit this vulnerability to perform unauthorized actions remotely. The exploit has been publicly disclosed, raising concerns about potential misuse. Users of the affected version should take immediate action to mitigate their exposure.

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-2026-9429 - Proof of Concept

References

https://vuldb.com/vuln/365410
vdb-entrytechnical-description
https://vuldb.com/vuln/365410/cti
signaturepermissions-required
https://vuldb.com/submit/813912
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)
.