8.5

CVE-2021-27221: mikrotik routeros

CVSS: 8.5v2.0HighModified
Published 19-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-27221 is a high (CVSS 8.5) vulnerability in mikrotik routeros. EPSS estimates a 4.04% chance of exploitation in the next 30 days, higher than 90.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v2.0 (NVD)
EPSS score
4.04%
0%100%
Low · -0.45 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 19-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

4.04%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

-0.45 pp

From 4.49% on 20-09-2026

20-09-202620-10-2026
EPSS score
4.04%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (onovy.medium.com)

    Maturity: unknown

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Mikrotik1 product

1 vendor · 1 product

References

1 links