Stack-Based Buffer Overflow in Tenda F451 Router
CVE-2026-5990

8.7HIGH

Key Information:

Vendor

Tenda
Status
F451
Vendor
CVE Published:
9 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5990?

A stack-based buffer overflow vulnerability has been identified in the Tenda F451 router, specifically within the fromSafeEmailFilter function found in the /goform/SafeEmailFilter file. This flaw arises from improper handling of input arguments, allowing attackers to manipulate the 'page' parameter. If successfully exploited, this vulnerability enables remote attackers to execute arbitrary code, potentially compromising the security of the device. Public knowledge of the exploit further indicates an urgent need for users to employ protective measures.

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-2026-5990 - Proof of Concept

References

https://vuldb.com/vuln/356544
vdb-entrytechnical-description
https://vuldb.com/vuln/356544/cti
signaturepermissions-required
https://vuldb.com/submit/792861
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

Jimi (VulDB User)
.