Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to a memory exhaustion vulnerability. An authenticated remote attacker can crash the HTTP server and in some circumstances reboot the system via a crafted HTTP POST request.
http://seclists.org/fulldisclosure/2019/Jul/20
https://mikrotik.com/download/changelogs
https://mikrotik.com/download/changelogs/bugfix-release-tree
Source: MITRE
Published: 2018-08-23
Updated: 2019-07-23
Type: CWE-400
Base Score: 6.8
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 8
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM