Stack-based Buffer Overflow in Tenda F456 Router
CVE-2026-6198

8.7HIGH

Key Information:

Vendor

Tenda
Status
F456
Vendor
CVE Published:
13 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6198?

A security flaw has been identified in the Tenda F456 router version 1.0.0.5, specifically in the fromNatStaticSetting function located in the /goform/NatStaticSetting file. This vulnerability allows for remote exploitation through the manipulation of the argument 'page', resulting in a stack-based buffer overflow. Attackers can leverage this issue to potentially execute arbitrary code or disrupt the operation of the device. The exploit has been publicly disclosed, raising significant concerns regarding network security for users of the affected product.

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-2026-6198 - Proof of Concept

References

https://vuldb.com/vuln/357120
vdb-entrytechnical-description
https://vuldb.com/vuln/357120/cti
signaturepermissions-required
https://vuldb.com/submit/797470
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)
.