7.5

CVE-2020-20021: mikrotik routeros Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighModified
Published 12-07-2023Last modified 09-07-2026
Open JSON

Vulnerability summary

CVE-2020-20021 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in mikrotik routeros. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.8% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.01%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Timeline

  1. 12-07-2023
    PublishedVulnerability first disclosed.
  2. 09-07-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

1.01%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

0.00 pp

From 1.01% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.01%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databasedoshardwareUnverified

    Microtik SSH Daemon 6.44.3 - Denial of Service (PoC)

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Mikrotik1 product

1 vendor · 1 product

References

1 links