Buffer Overflow Vulnerability in Tenda F453 Router
CVE-2026-3275

8.7HIGH

Key Information:

Vendor

Tenda
Status
F453
Vendor
CVE Published:
27 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3275?

A vulnerability exists in the Tenda F453 router, specifically within the fromAddressNat function in the /goform/addressNat component of its httpd service. By manipulating the 'entrys' argument, an attacker can trigger a buffer overflow, potentially allowing for unauthorized access to the device. This exploit can be executed remotely, putting systems at risk. Publicly available exploit methods increase the urgency for users to review their security postures and apply necessary updates.

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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-2026-3275 - Proof of Concept

References

https://vuldb.com/?id.347999
vdb-entrytechnical-description
https://vuldb.com/?ctiid.347999
signaturepermissions-required
https://vuldb.com/?submit.759622
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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