---
id: CVE-2020-20211
title: >-
  Mikrotik RouterOs 6.44.5 (long-term tree) suffers from an assertion failure
  vulnerability in the /nova/bin/console process
summary: >-
  Mikrotik RouterOs 6.44.5 (long-term tree) suffers from an assertion failure
  vulnerability in the /nova/bin/console process. An authenticated remote
  attacker can cause a Denial of Service due to an assertion failure via a
  crafted packet.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
vendor: mikrotik
product: routeros
affected:
  - routeros = 6.44.5
published: '2021-07-07'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T21:17:05.603'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-20211'
references:
  - url: 'http://seclists.org/fulldisclosure/2021/May/0'
    label: cve@mitre.org
  - url: 'https://mikrotik.com/'
    label: cve@mitre.org
  - url: 'https://seclists.org/fulldisclosure/2020/Apr/7'
    label: cve@mitre.org
  - url: 'https://seclists.org/fulldisclosure/2020/Jan/12'
    label: cve@mitre.org
  - url: 'http://seclists.org/fulldisclosure/2021/May/0'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://mikrotik.com/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.02533
epssPercentile: 0.84271
ingestedAt: '2026-09-16T21:05:36.903Z'
---

## Overview

Mikrotik RouterOs 6.44.5 (long-term tree) suffers from an assertion failure vulnerability in the /nova/bin/console process. An authenticated remote attacker can cause a Denial of Service due to an assertion failure via a crafted packet.

## Affected

- `routeros = 6.44.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.