Stack-Based Buffer Overflow in Tenda RX3 Router
CVE-2026-2185

8.7HIGH

Key Information:

Vendor

Tenda
Status
Rx3
Vendor
CVE Published:
8 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2185?

A security flaw has been identified in the Tenda RX3 router, specifically in the MAC Filtering Configuration Endpoint. The vulnerability lies in the function set_device_name located in the /goform/setBlackRule file, where improper handling of the devName/mac argument leads to a stack-based buffer overflow. This weakness can be exploited remotely, allowing attackers to manipulate device settings through crafted requests. As the exploit is publicly available, it raises significant security concerns for users of the affected firmware version.

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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-2026-2185 - Proof of Concept

References

https://vuldb.com/?id.344888
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344888
signaturepermissions-required
https://vuldb.com/?submit.749715
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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