CVE-2020-20266 json
Mikrotik RouterOs before 6.47 (stable tree) suffers from a memory corruption vulnerability in the /nova/bin/dot1x process.
published 2021-05-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-13053
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
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).
Patch / fix
- mikrotik routeros 6.47
Exploit prediction
2.10% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- seclists.org https://seclists.org/fulldisclosure/2021/May/11 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Classification
References
-
seclists.org
/fulldisclosure/2021/May/11
exploit, mailing-list, third-party-advisory
-
github.com
/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_dot1x/README.md
broken-link, third-party-advisory
Sources
- CVE List CVE-2020-20266
- NVD CVE-2020-20266
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