Synced 02 Nov 2026 13:39 UTC Account

Is RouterOS 6.21.1 patched?

MikroTik · cycle 6.21
6.21.10/100Critical · exploited

Current stable (7.25): 97/100

Minimum safe version7.23.6

6.21.1 has 21 open critical-or-high vulnerabilities. Run 7.23.6 or later to clear them. See what 7.23.6 fixes →

Upgrade impact: Major upgrade. Crossing a major version usually means breaking changes. Review the vendor’s upgrade / migration guide and test before you roll it out.

Health score0/100
Open issues50
Exploited now5
Cycle 6.21 EOL—
Latest release7.25

Summary iPlain-English security status for RouterOS 6.21.1, built from its CVEs, active-exploitation data, end-of-life date and latest release.

RouterOS 6.21.1 is part of the 6.21 release line. 5 actively-exploited vulnerabilities affect it (CISA KEV). The minimum safe version is 7.23.6 — upgrade to it or later to clear the open critical/high issues. The latest supported RouterOS release is 7.25.

Known issues affecting 6.21.1

Exploited first, then by exploitation probability.

CVE-2018-14847 CRITICAL exploited EPSS 96% → see advisory CVE-2018-7445 CRITICAL exploited EPSS 66% → fixed in 6.41.3 CVE-2026-86060 CRITICAL exploited EPSS 6% → fixed in 7.24.2 CVE-2026-67279 MEDIUM exploited EPSS 2% → fixed in 7.24.2 CVE-2026-67277 HIGH exploited EPSS 2% → fixed in 7.24.2 CVE-2019-3924 HIGH EPSS 16% → fixed in 6.43.12 CVE-2019-3978 HIGH EPSS 10% → see advisory CVE-2018-1156 HIGH EPSS 7% → fixed in 6.42.7 CVE-2018-1157 MEDIUM EPSS 4% → fixed in 6.42.7 CVE-2019-13954 MEDIUM EPSS 4% → fixed in 6.44.5 CVE-2019-13955 MEDIUM EPSS 4% → fixed in 6.44.5 CVE-2019-3943 HIGH EPSS 4% → see advisory CVE-2020-20221 MEDIUM EPSS 3% → fixed in 6.44.6 CVE-2020-20220 MEDIUM EPSS 3% → fixed in 6.47 CVE-2020-10364 HIGH EPSS 3% → see advisory CVE-2019-16160 HIGH EPSS 3% → fixed in 6.45.5 CVE-2018-1158 MEDIUM EPSS 2% → fixed in 6.42.7 CVE-2018-1159 MEDIUM EPSS 2% → fixed in 6.42.7 CVE-2017-20149 CRITICAL EPSS 2% → fixed in 6.38.5 CVE-2019-15055 MEDIUM EPSS 2% → see advisory

Other RouterOS versions

Check another release line of RouterOS.

RouterOS 7.25RouterOS 7.24.5RouterOS 7.23.8RouterOS 7.22.3RouterOS 7.21.5RouterOS 7.20.8RouterOS 7.19.6RouterOS 7.18.2RouterOS 7.17.2RouterOS 7.16.2RouterOS 7.15.3RouterOS 7.14.3RouterOS 7.13.5RouterOS 7.12.2RouterOS 7.11.3RouterOS 7.10.2RouterOS 7.9.2RouterOS 7.8RouterOS 7.7RouterOS 7.6RouterOS 7.5RouterOS 7.4.1RouterOS 7.3.1RouterOS 7.2.3RouterOS 7.1.5RouterOS 6.49.22RouterOS 6.48.7RouterOS 6.47.10RouterOS 6.46.8RouterOS 6.45.9RouterOS 6.44.6RouterOS 6.43.16RouterOS 6.42.12RouterOS 6.41.4RouterOS 6.40.9RouterOS 6.39.3RouterOS 6.38.7RouterOS 6.37.5RouterOS 6.36.3RouterOS 6.35.4RouterOS 6.34.6RouterOS 6.33.6RouterOS 6.32.4RouterOS 6.30.4RouterOS 6.29.1RouterOS 6.28RouterOS 6.27RouterOS 6.26RouterOS 6.25RouterOS 6.24RouterOS 6.23RouterOS 6.22RouterOS 6.19RouterOS 6.18RouterOS 6.17RouterOS 6.16RouterOS 6.15RouterOS 6.14RouterOS 6.13RouterOS 6.12RouterOS 6.11RouterOS 6.10RouterOS 6.9RouterOS 6.7RouterOS 6.6RouterOS 6.5RouterOS 6.4RouterOS 6.3RouterOS 6.2RouterOS 6.1RouterOS 6.0RouterOS 5.26RouterOS 5.25RouterOS 5.24RouterOS 5.23RouterOS 5.22RouterOS 5.21RouterOS 5.20RouterOS 5.19RouterOS 5.18RouterOS 5.17RouterOS 5.16RouterOS 5.14RouterOS 5.13RouterOS 5.12RouterOS 5.11RouterOS 5.9RouterOS 5.8RouterOS 5.7RouterOS 4.17RouterOS 4.10RouterOS 3.30

Frequently asked

Is RouterOS 6.21.1 patched?

No — 5 actively-exploited vulnerabilities affect RouterOS 6.21.1. Upgrade to at least 7.23.6.

What version should I upgrade RouterOS 6.21.1 to?

Upgrade RouterOS 6.21.1 to at least 7.23.6 to clear its 21 open critical-or-high vulnerabilities.

What is the latest version of RouterOS?

The latest supported RouterOS release is 7.25.

Is RouterOS 6.21.1 still receiving security updates?

Yes — the 6.21 line is still supported and receiving security updates. The latest release is 7.25.

Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against MikroTik's official advisory before you patch or upgrade.