Buffer Overflow Vulnerability in Tenda F451 Router
CVE-2026-6123

8.7HIGH

Key Information:

Vendor

Tenda
Status
F451
Vendor
CVE Published:
12 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6123?

A vulnerability has been identified in the Tenda F451 router version 1.0.0.7, specifically within the fromAddressNat function in the httpd component. This issue arises from inadequate validation of the input arguments, leading to a stack-based buffer overflow. An attacker could exploit this vulnerability remotely by manipulating the input, potentially compromising the router's integrity. The exploit code has been released publicly, raising significant concerns for network security.

Affected Version(s)

F451 1.0.0.7

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-2026-6123 - Proof of Concept

References

https://vuldb.com/vuln/356986
vdb-entrytechnical-description
https://vuldb.com/vuln/356986/cti
signaturepermissions-required
https://vuldb.com/submit/792873
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

Jxm666 (VulDB User)
.