CVE-2020-20221: mikrotik routeros Uncontrolled Resource Consumption
CVSS: 6.8v2.0MediumModified
Published 21-07-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-20221 is a medium (CVSS 6.8) Uncontrolled Resource Consumption vulnerability in mikrotik routeros. EPSS estimates a 2.91% chance of exploitation in the next 30 days, higher than 86.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.8/10
010
Medium · v2.0 (NVD)EPSS score
2.91%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 21-07-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Mikrotik RouterOs before 6.44.6 (long-term tree) suffers from an uncontrolled resource consumption vulnerability in the /nova/bin/cerm process. An authenticated remote attacker can cause a Denial of Service due to overloading the systems CPU.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesSingle source
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:N/A:CSourcesSingle source
EPSS trend
Probability
2.91%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.91% on 21-09-2026
21-09-202621-10-2026
EPSS score2.91%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (seclists.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Mikrotik1 product
- routeros< 6.44.6
1 vendor · 1 product