What does upgrading RouterOS 7.21.5 to 7.23.6 fix?

Upgrading RouterOS from 7.21.5 to 7.23.6 clears 6 known vulnerabilities (2 critical, 3 high), including 3 under active exploitation (CISA KEV). 1 known issue remains in 7.23.6.

← RouterOS

RouterOS: 7.21.5 → 7.23.6

MikroTik · upgrade impact

From7.21.57 known issues To7.23.61 known issue

Upgrade impact: Minor upgrade. Minor releases are usually backwards-compatible, but can add or change behaviour — test in staging before production.

Fixed by upgrading to 7.23.6 iVulnerabilities that affect 7.21.5 but no longer affect 7.23.6 — the security gain from this upgrade, by exploited status then exploitation probability.

Exploited first, then by exploitation probability (EPSS).

CVE-2026-86060 CRITICAL exploited EPSS 6% ✓ cleared in 7.23.6 CVE-2026-67279 MEDIUM exploited EPSS 2% ✓ cleared in 7.23.6 CVE-2026-67277 HIGH exploited EPSS 2% ✓ cleared in 7.23.6 CVE-2026-67276 HIGH EPSS 9% ✓ cleared in 7.23.6 CVE-2026-67281 HIGH EPSS 1% ✓ cleared in 7.23.6 CVE-2026-67278 CRITICAL EPSS 0% ✓ cleared in 7.23.6

Still open in 7.23.6 iKnown vulnerabilities that affect 7.23.6 too — upgrading to it does not clear these.

These affect 7.23.6 as well — a later release may be needed.

CVE-2021-3014 MEDIUM EPSS 1% → see advisory