Stack-based Buffer Overflow in Tenda RX3 Router
CVE-2026-2186

8.7HIGH

Key Information:

Vendor

Tenda
Status
Rx3
Vendor
CVE Published:
8 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2186?

The Tenda RX3 router suffers from a stack-based buffer overflow vulnerability in the fromSetIpMacBind function located in the /goform/SetIpMacBind file. This flaw allows attackers to manipulate the argument list remotely, potentially leading to arbitrary code execution. The public disclosure of this exploit poses a significant risk to network security, making it imperative for users to apply necessary patches or mitigative measures to protect their devices.

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Affected Version(s)

RX3 16.03.13.11

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-2026-2186 - Proof of Concept

References

https://vuldb.com/?id.344889
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344889
signaturepermissions-required
https://vuldb.com/?submit.749718
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

LX-66-LX (VulDB User)
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