CVE-2018-14847
MikroTik Router OS Directory Traversal Vulnerability
MikroTik RouterOS
MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 1 December 2021. US federal agencies were required to remediate it by 1 June 2022.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 96.1%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Frequently asked questions
Is CVE-2018-14847 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2018-14847.
What does CVE-2018-14847 affect?
CVE-2018-14847 affects MikroTik RouterOS. MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface.
How severe is CVE-2018-14847?
CVE-2018-14847 is rated CRITICAL with a CVSS base score of 9.1. EPSS puts the probability of exploitation in the next 30 days at 96.1%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 1 June 2022.
How should organisations respond to CVE-2018-14847?
Apply the vendor patch for MikroTik RouterOS as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.