CVEvulnerability

CVE-2021-27221

8.1 HIGH Published 2021-03-19 Modified 2026-06-17 Official page ↗

Status: Modified
Published: 2021-03-19
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0 ([email protected]): 8.5 HIGH — AV:N/AC:L/Au:S/C:N/I:C/A:C

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

Affected configurations

• mikrotik routeros 6.47.9

References

https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesystem-cve-2021-27221-e3e45d780dfe Exploit, Third Party Advisory
https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesystem-cve-2021-27221-e3e45d780dfe Exploit, Third Party Advisory