Denial of service in MikroTik RouterOS

Published: 2019-02-25
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-3924
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
MikroTik RouterOS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor MikroTik

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU17851

Risk: Medium


CVE-ID: CVE-2019-3924

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: Yes


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the Winbox service. A remote attacker can send a specially crafted request to the affected service and trigger denial of service conditions.

Successful exploitation of the vulnerability requires that the Winbox service is exposed to the attacker.


Install updates from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 6.43.1 - 6.43.11, 6.42 - 6.42.11

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?