CVE-2020-20246

Name: CVE-2020-20246
Creator: NVD / NIST
Published: 2021-05-18T20:15:07.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.74%

Last modified Jun 17, 2026

CVE-2020-20246 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Mikrotik RouterOs stable 6.46.3 suffers from a memory corruption vulnerability in the mactel process. An authenticated remote attacker can cause a Denial of Service due to improper memory access.. EPSS estimates a 2.74% chance of exploitation in the next 30 days.

Description

Mikrotik RouterOs stable 6.46.3 suffers from a memory corruption vulnerability in the mactel process. An authenticated remote attacker can cause a Denial of Service due to improper memory access.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.74%

84.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mikrotik	Routeros	6.46.3

References

http://packetstormsecurity.com/files/162533/MikroTik-RouterOS-Memory-Corruption.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/May/23Exploit, Mailing List, Third Party Advisory
https://mikrotik.com/Product
http://packetstormsecurity.com/files/162533/MikroTik-RouterOS-Memory-Corruption.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/May/23Exploit, Mailing List, Third Party Advisory
https://mikrotik.com/Product

Timeline

Published: May 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-20246?

Mikrotik RouterOs stable 6.46.3 suffers from a memory corruption vulnerability in the mactel process. An authenticated remote attacker can cause a Denial of Service due to improper memory access.

How severe is CVE-2020-20246?

CVE-2020-20246 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.74% probability of exploitation in the next 30 days.

How do I fix CVE-2020-20246?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-20246?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST