CVE-2019-3924: High severity Mikrotik RouterOS vulnerability

Published Feb 20, 2019
·
Updated

MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.

Affected Software

3 affected components
Mikrotik RouterOS<6.42.12
Mikrotik RouterOS<6.43.12
Mikrotik RouterOS<6.43.12

Event History

Feb 20, 2019
CVE Published
via MITRE·08:00 PM
Data Sourced
via MITRE·08:00 PM
DescriptionWeakness
Data Sourced
via NVD·08:29 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2019-3924?

CVE-2019-3924 has a high severity rating due to its potential for remote unauthenticated exploitation.

2

How do I fix CVE-2019-3924?

To fix CVE-2019-3924, update MikroTik RouterOS to versions 6.43.12 or later or 6.42.12 for long-term support.

3

Who is affected by CVE-2019-3924?

CVE-2019-3924 affects MikroTik RouterOS versions prior to 6.43.12 and 6.42.12.

4

What kind of attacks can exploit CVE-2019-3924?

CVE-2019-3924 can be exploited for bypassing firewall rules and executing unauthorized commands by remote attackers.

5

Is CVE-2019-3924 a known vulnerability?

Yes, CVE-2019-3924 is a known vulnerability that has been publicly disclosed and documented.

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