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.

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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