Stack-based Buffer Overflow in Tenda RX3 Router
CVE-2026-2181

8.7HIGH

Key Information:

Vendor

Tenda
Status
Rx3
Vendor
CVE Published:
8 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2181?

A security vulnerability has been identified in the Tenda RX3 router, specifically in the '/goform/openSchedWifi' file. This flaw allows for a stack-based buffer overflow when the arguments 'schedStartTime' and 'schedEndTime' are manipulated. The issue can be exploited remotely, posing significant risks to the device. With the exploit publicly available, it is crucial for users to ensure their devices are secure and up to date to prevent potential attacks.

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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-2026-2181 - Proof of Concept

References

https://vuldb.com/?id.344884
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344884
signaturepermissions-required
https://vuldb.com/?submit.749710
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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