CVE-2021-27221
highpriority · track · 33EPSS 0.040 · 91 %ileEURUUSgrimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
4.04% (91st) EPSS
CVSS 8.5 · high
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · nvd
EPSS · scored 2026-10-26
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
01
cvss
Technical severity, 0–10. One row per scoring source.
8.5
010
base score 0–10 · higher = more severe · hover a vector to decode
v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.2
02
weaknesses
The CWE weakness classes this flaw belongs to.
03
affected products (3)
Products and version ranges known to be affected.
04
also known as (4)
Other names and identifiers for this entity.
05
sources
Which sources assert this record, and when.
06
references (4)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-27221cnnvd
- https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesystem-cve-2021-27221-e3e45d780dfecnnvd
- https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesystem-cve-2021-27221-e3e45d780dfeenisa_euvd
- https://onovy.medium.com/routeros-user-with-just-ftp-policy-can-write-to-filesystem-cve-2021-27221-e3e45d780dfeExploitThird Party Advisorynvd
scry
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