Buffer Overflow Vulnerability in Tenda F456 Router
CVE-2026-7033

8.7HIGH

Key Information:

Vendor

Tenda
Status
F456
Vendor
CVE Published:
26 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7033?

A vulnerability has been identified in the Tenda F456 router, specifically in the fromSafeClientFilter function within the /goform/SafeClientFilter file. An attacker can manipulate the argument menufacturer/Go, leading to a buffer overflow condition. This vulnerability can be exploited remotely, posing potential risk to network security. The details of this exploit have been made public, increasing the urgency for users to apply necessary patches or mitigations.

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-2026-7033 - Proof of Concept

References

https://vuldb.com/vuln/359613
vdb-entrytechnical-description
https://vuldb.com/vuln/359613/cti
signaturepermissions-required
https://vuldb.com/submit/798454
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

LtzHust2 (VulDB User)
.