CVE-2021-45736

Name: CVE-2021-45736
Creator: NVD / NIST
Published: 2022-02-04T02:15:08.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.16%

Last modified Jun 17, 2026

CVE-2021-45736 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. TOTOLINK X5000R v9.1.0u.6118_B20201102 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.. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

TOTOLINK X5000R v9.1.0u.6118_B20201102 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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.16%

63.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Totolink	X5000r Firmware	9.1.0u.6118_b20201102

References

https://github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_9/9.mdExploit, Third Party Advisory
https://github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_9/9.mdExploit, Third Party Advisory

Timeline

Published: Feb 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45736?

How severe is CVE-2021-45736?

CVE-2021-45736 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45736?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45736?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST