CVE-2020-20021: High severity Mikrotik RouterOS vulnerability

Published Jul 12, 2023
·
Updated

An issue discovered in MikroTik Router v6.46.3 and earlier allows attacker to cause denial of service via misconfiguration in the SSH daemon.

Affected Software

1 affected component
Mikrotik RouterOS<=6.46.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade MikroTik RouterOS to a version that resolves this vulnerability.

    Fixed in 6.46.3

Event History

Jul 12, 2023
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·01:15 PM
DescriptionSeverityWeaknessAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the vulnerability ID?

CVE-2020-20021

2

What is the severity of CVE-2020-20021?

The severity of CVE-2020-20021 is high.

3

What is the affected software?

MikroTik Router v6.46.3 and earlier.

4

How can an attacker exploit CVE-2020-20021?

An attacker can cause a denial of service by misconfiguring the SSH daemon.

5

Are there any known exploits for CVE-2020-20021?

Yes, there are known exploits for CVE-2020-20021. Please refer to the references provided for more information.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203
CVE-2020-20021 - High severity Mikrotik RouterOS vulnerability - SecAlerts