Stack-Based Buffer Overflow in Tenda FH1201 Router
CVE-2026-5045

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh1201
Vendor
CVE Published:
29 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5045?

A stack-based buffer overflow vulnerability exists in the Tenda FH1201 router’s WrlclientSet function, specifically located in the /goform/WrlclientSet file. This vulnerability arises from improper handling of the GO argument, allowing attackers to exploit the flaw remotely. Given that the exploit is now publicly available, it poses a significant risk to users who have not yet applied the necessary updates or mitigations.

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Affected Version(s)

FH1201 1.2.0.14(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-2026-5045 - Proof of Concept

References

https://vuldb.com/vuln/353968
vdb-entrytechnical-description
https://vuldb.com/vuln/353968/cti
signaturepermissions-required
https://vuldb.com/submit/779126
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)
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