NULL pointer dereference in Mikrotik Routeros
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).
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: 0.021 (80.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_dot1x/README.md (Third Party Advisory, Broken Link)
- seclists.org/fulldisclosure/2021/May/11 (Exploit, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-20266?
- CVE-2020-20266 is a medium-severity vulnerability in Mikrotik Routeros, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2021-05-19.
- How severe is CVE-2020-20266?
- Medium severity. CVSS v3 base score is 6.5 out of 10.