Buffer Overflow Vulnerability in Tenda F453 Router
CVE-2026-3398

8.7HIGH

Key Information:

Vendor

Tenda
Status
F453
Vendor
CVE Published:
1 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3398?

A buffer overflow vulnerability exists in the Tenda F453 router, specifically in the 'fromAdvSetWan' function located at /goform/AdvSetWan in the httpd component. An attacker can manipulate the 'wanmode' and 'PPPOEPassword' arguments, leading to a potential buffer overflow condition. This exploit can be executed remotely, enabling unauthorized actions that could compromise the device's integrity. Given that this vulnerability has been publicly disclosed, users are urged to take immediate action to mitigate potential risks.

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Affected Version(s)

F453 1.0.0.3

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-2026-3398 - Proof of Concept

References

https://vuldb.com/?id.348293
vdb-entrytechnical-description
https://vuldb.com/?ctiid.348293
signaturepermissions-required
https://vuldb.com/?submit.759630
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)
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