CVE-2021-27221

Public Exploit

Description

MikroTik RouterOS 6.47.9 allows remote authenticated ftp users to create or overwrite arbitrary .rsc files via the /export command. NOTE: the vendor's position is that this is intended behavior because of how user policies work

8.1

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 41.89% Top 5%

Third-Party Advisory medium.com

Affected: n/a n/a

References

Link	Tags
https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesystem-cve-2021-27221-e3e45d780dfe	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-27221?: CVE-2021-27221 has been scored as a high severity vulnerability.
How to fix CVE-2021-27221?: To fix CVE-2021-27221, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27221 being actively exploited in the wild?: It is possible that CVE-2021-27221 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~42% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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