Threat landscape
high

MikroTik RouterOS: Schwachstelle ermöglicht Codeausführung und DoS

WID-SEC-2026-3661 · first 30.09.2026 · updated 05.10.2026 · CVSS 9,8

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What it is about

MikroTik RouterOS ist ein auf Linux basierendes Betriebssystem, das für MikroTik RouterBOARD Hardware und PC-Installationen entwickelt wurde und umfangreiche Routing-, Firewall- und Netzwerkverwaltungsfunktionen bietet. Ein entfernter Angreifer kann eine Schwachstelle in MikroTik RouterOS ausnutzen, um beliebigen Programmcode auszuführen oder einen Denial-of-Service-Zustand auszulösen.

Under what conditions?

Over the network.

What can happen in the worst case

An attacker could use the vulnerability to

  • beliebigen Programmcode auszuführen oder einen Denial-of-Service-Zustand auszulösen

Am I affected?

Affected according to the BSI:

  • MikroTik RouterOS <7.24

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

  • MikroTik RouterOS 7.24

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.

Information and sources

CVE: CVE-2026-84411

Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.

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