Stack-based Buffer Overflow in Tenda O3 Router
CVE-2025-12213

8.7HIGH

Key Information:

Vendor

Tenda
Status
O3
Vendor
CVE Published:
27 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-12213?

A security flaw has been identified in the Tenda O3 router that affects the SetValue and GetValue functions within the /goform/setVlanConfig file. This vulnerability allows for remote exploitation through a stack-based buffer overflow triggered by malicious manipulation of the LAN argument. The vulnerability is publicly known and poses a risk to users of the affected product version, necessitating timely security updates and precautions to safeguard against potential attacks.

Affected Version(s)

O3 1.0.0.10(2478)

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-2025-12213 - Proof of Concept

References

https://vuldb.com/?id.329883
vdb-entrytechnical-description
https://vuldb.com/?ctiid.329883
signaturepermissions-required
https://vuldb.com/?submit.673268
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

yhryhryhr_ (VulDB User)
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