MikroTik RouterOS: Mehrere Schwachstellen
WID-SEC-2026-3436 · first 17.09.2026 · updated 17.09.2026 · CVSS 7,5
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, anonymer Angreifer kann mehrere Schwachstellen in MikroTik RouterOS ausnutzen, um vertrauliche Speicherinhalte offenzulegen und einen Denial-of-Service-Zustand herbeizuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- vertrauliche Speicherinhalte offenzulegen
- einen Denial-of-Service-Zustand herbeizuführen
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
- Original BSI advisory (WID)
- GitHub Advisory Database vom 2026-09-16 github.com
- GitHub Advisory Database vom 2026-09-16 github.com
CVE: CVE-2026-56719, CVE-2026-89028
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.