Stack-Based Buffer Overflow in Tenda O3V2 Router
CVE-2025-7423

8.7HIGH

Key Information:

Vendor

Tenda
Status
O3v2
Vendor
CVE Published:
11 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7423?

A stack-based buffer overflow vulnerability exists in the Tenda O3V2 router, specifically in the 'formWifiMacFilterSet' function within the 'httpd' component. This flaw results from improper handling of the 'macList' argument in the 'setWrlFilterList' routine, allowing remote attackers to execute arbitrary code. The vulnerability has been publicly disclosed, increasing the risk of exploitation for devices running affected firmware versions.

Affected Version(s)

O3V2 1.0.0.12(3880)

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-2025-7423 - Proof of Concept

References

https://vuldb.com/?id.315883
vdb-entrytechnical-description
https://vuldb.com/?ctiid.315883
signaturepermissions-required
https://vuldb.com/?submit.608869
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

pjq123 (VulDB User)
.
CVE-2025-7423 : Stack-Based Buffer Overflow in Tenda O3V2 Router