CVE-2020-20266
CVSS v3
6.5
MEDIUM
EPSS Score
2.1 %
exploit probability, as of 2026-10-07
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Mikrotik RouterOs before 6.47 (stable tree) suffers from a memory corruption vulnerability in the /nova/bin/dot1x process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).
Technical details
- Published
- 2021-05-19
Frequently asked questions
What is CVE-2020-20266?
Mikrotik RouterOs before 6.47 (stable tree) suffers from a memory corruption vulnerability in the /nova/bin/dot1x process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).
Is CVE-2020-20266 actively exploited?
Active exploitation of CVE-2020-20266 has not been confirmed. Its EPSS score was 2.1% on 2026-10-07, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-20266?
CVE-2020-20266 has a CVSS v3 base score of 6.5 (MEDIUM severity).
Is CVE-2020-20266 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 50 free checks/month · Free API key
Other 2020 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).