Heap-based Buffer Overflow in Tenda M3 Router
CVE-2025-15234

8.7HIGH

Key Information:

Vendor

Tenda
Status
M3
Vendor
CVE Published:
30 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15234?

A vulnerability has been discovered in Tenda M3 routers, specifically in the formSetRemoteInternetLanInfo function located in the /goform/setInternetLanInfo file. This flaw permits an attacker to manipulate arguments such as portIp, portMask, portGateWay, portDns, and portSecDns, leading to a heap-based buffer overflow. The vulnerability is exploitable remotely, and public exploits are available, significantly increasing the risk of unauthorized access and potential network breaches.

Affected Version(s)

M3 1.0.0.13(4903)

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-2025-15234 - Proof of Concept

References

https://vuldb.com/?id.338630
vdb-entrytechnical-description
https://vuldb.com/?ctiid.338630
signaturepermissions-required
https://vuldb.com/?submit.725496
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

dwbruijn (VulDB User)
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