CVE-2021-45736: High severity totolink x5000r firmware vulnerability

Published Feb 4, 2022

Updated

TOTOLINK X5000R v9.1.0u.6118B20201102 was discovered to contain a stack overflow in the function setL2tpServerCfg. This vulnerability allows attackers to cause a Denial of Service (DoS) via the eip, sip, server parameters.

Affected Software

2 affected components

TOTOLINK X5000r Firmware=9.1.0u.6118_b20201102

TOTOLINK X5000R

Event History

Feb 4, 2022

CVE Published

via MITRE·01:33 AM

Data Sourced

via MITRE·01:33 AM

Description

Frequently Asked Questions

What is CVE-2021-45736?

CVE-2021-45736 is a vulnerability found in the TOTOLINK X5000R v9.1.0u.6118_B20201102 firmware that allows attackers to cause a denial of service (DoS) by exploiting a stack overflow in the setL2tpServerCfg function.

How severe is CVE-2021-45736?

CVE-2021-45736 is considered a high severity vulnerability with a severity score of 7.5.

How can an attacker exploit CVE-2021-45736?

An attacker can exploit CVE-2021-45736 by sending specially crafted parameters to the setL2tpServerCfg function, causing a stack overflow and resulting in a denial of service.

Is TOTOLINK X5000R v9.1.0u.6118_B20201102 the only affected version?

Yes, TOTOLINK X5000R v9.1.0u.6118_B20201102 is the only affected version.

How can I mitigate CVE-2021-45736?

Currently, there is no known mitigation for CVE-2021-45736. It is recommended to update to a patched version of the firmware when available.