Stack-Based Buffer Overflow in Tenda F456 Router by Tenda
CVE-2026-6200

8.7HIGH

Key Information:

Vendor

Tenda
Status
F456
Vendor
CVE Published:
13 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6200?

A vulnerability exists in the Tenda F456 router, specifically within the function 'formwebtypelibrary' located in the file '/goform/webtypelibrary'. This weakness is attributed to a stack-based buffer overflow caused by improper handling of the 'menufacturer/Go' argument. The vulnerability can be exploited remotely, allowing an attacker to execute arbitrary code or disrupt normal operations. As this exploit has been publicly disclosed, it is crucial for users to apply the relevant mitigations to safeguard their devices against potential attacks.

Affected Version(s)

F456 1.0.0.5

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-2026-6200 - Proof of Concept

References

https://vuldb.com/vuln/357122
vdb-entrytechnical-description
https://vuldb.com/vuln/357122/cti
signaturepermissions-required
https://vuldb.com/submit/797472
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

LtzHuster (VulDB User)
.