Stack-Based Buffer Overflow Vulnerability in Tenda FH451 by Tenda
CVE-2026-4535

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
22 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4535?

A stack-based buffer overflow vulnerability has been identified in the Tenda FH451 router, specifically within the WrlclientSet function located in the /goform/WrlclientSet file. This issue arises when an attacker manipulates the GO argument, allowing for remote code execution. Given that the exploit has been publicly disclosed, users of the Tenda FH451 version 1.0.0.9 are strongly advised to consider mitigating actions to protect their networks.

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Affected Version(s)

FH451 1.0.0.9

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-2026-4535 - Proof of Concept

References

https://vuldb.com/?id.352323
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352323
signaturepermissions-required
https://vuldb.com/?submit.774343
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)
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