Remote Code Execution Vulnerability in MikroTik RouterOS
CVE-2021-27221

8.1HIGH

Key Information:

Vendor

Mikrotik

Status
Routeros
Vendor
CVE Published:
19 March 2021

What is CVE-2021-27221?

MikroTik RouterOS versions, specifically 6.47.9, allow remote authenticated FTP users to create or overwrite arbitrary .rsc files through the /export command. This behavior has been categorized by the vendor as intended due to user policy configurations, which poses a significant risk if not properly managed. Organizations using this version of RouterOS should review their FTP access policies to mitigate potential security threats.

References

https://onovy.medium.com/routeros-user-with-just-ftp-poli...
x_refsource_MISC

EPSS Score

41% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.