CVE-2026-67278: Mikrotik RouterOS

TLS server impersonation possible in Mikrotik RouterOS

CVSS 6.3 MediumEPSS 0.0026 · 17th percentile

Published by the CVE Program (CNA: CERT-PL) at 5 Sept 2026, 20:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Mikrotik	RouterOS	affected 7.24 to before 7.24.3 custom affected 7.0.0 to before 7.23.6 custom Other versions: unaffected

Identifiers

CVE-2026-67278

CNA

CERT-PL

Weakness (CWE)

CWE-347

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.3	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (CERT-PL)

CISA KEV Not listed.
EPSS 0.0026, the 17th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 5 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

cert.pl/en/posts/2026/09/mikrotik-routeros-cve third-party-advisory
cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/ technical-description
mikrotik.com/supportsec/september-2026-vulnerability/ vendor-advisory
forum.mikrotik.com/t/7-23-6-long-term-is-released/273139 release-notes
forum.mikrotik.com/t/7-24-3-stable-is-released/273138 release-notes
npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/ exploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.