Buffer Overflow Vulnerability in Tenda F456 Router
CVE-2026-7101

8.7HIGH

Key Information:

Vendor

Tenda
Status
F456
Vendor
CVE Published:
27 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7101?

A significant vulnerability has emerged in the Tenda F456 router, specifically in version 1.0.0.5. This flaw arises from the 'fromWrlclientSet' function within the '/goform/WrlclientSet' file of the httpd component, leading to a buffer overflow. The vulnerability could allow an attacker to exploit the device remotely. Given that this exploit has been publicly disclosed, proper security measures should be taken to safeguard affected routers and networks.

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-2026-7101 - Proof of Concept

References

https://vuldb.com/vuln/359676
vdb-entrytechnical-description
https://vuldb.com/vuln/359676/cti
signaturepermissions-required
https://vuldb.com/submit/798474
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)
.