#VU52987 Reachable Assertion in MikroTik RouterOS

Published: 2021-05-10 | Updated: 2021-06-01

Vulnerability identifier: #VU52987

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-20214


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MikroTik RouterOS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: MikroTik


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

The vulnerability exists due to a reachable assertion within the btest process. A remote authenticated user can send specially crafted packet to the system and trigger an assertion failure.

Install update from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 6.48 - 6.48.2, 6.47 - 6.47.9, 6.46 - 6.46.8, 6.45 - 6.45.9, 6.44 - 6.44.6, 6.43 - 6.43.16, 6.42 - 6.42.12, 6.40 - 6.40.9, 6.41 - 6.41.4

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability