Resource exhaustion in Mikrotik Routeros
CVE-2020-20221
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.029 (86.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cwe.mitre.org/data/definitions/400.html (Third Party Advisory)
- seclists.org/fulldisclosure/2020/May/30 (Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2021/May/1 (Exploit, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-20221?
- CVE-2020-20221 is a medium-severity vulnerability in Mikrotik Routeros, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-07-21.
- How severe is CVE-2020-20221?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-20221 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.