Stack-Based Buffer Overflow in Tenda O3 by Tenda
CVE-2025-12211

8.7HIGH

Key Information:

Vendor

Tenda
Status
O3
Vendor
CVE Published:
27 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-12211?

A security flaw has been identified in the Tenda O3 1.0.0.10(2478) that allows remote attackers to exploit a stack-based buffer overflow through the SetValue/GetValue functions in the /goform/setDmzInfo file. Manipulating the dmzIP argument can lead to the execution of arbitrary code, posing a significant risk as the exploit has been publicly available.

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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-2025-12211 - Proof of Concept

References

https://vuldb.com/?id.329881
vdb-entrytechnical-description
https://vuldb.com/?ctiid.329881
signaturepermissions-required
https://vuldb.com/?submit.673265
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_tu (VulDB User)
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