Linksys MR9600 Router: Schwachstelle ermöglicht Codeausführung
WID-SEC-2026-0814 · first 23.03.2026 · updated 23.03.2026 · CVSS 8,8
What it is about
Router der Firma Linksys enthalten eine Firewall und in der Regel eine WLAN-Schnittstelle. Die Geräte sind hauptsächlich für private Anwender und Kleinunternehmen konzipiert. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Linksys MR9600 Router ausnutzen, um beliebigen Programmcode auszuführen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode auszuführen
Am I affected?
Affected according to the BSI:
- Linksys Router MR9600 = 2.0.6.206937
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
According to the BSI there is no update yet. The vendor notices below name interim protective measures, if any.
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 2026-03-22 github.com
- GitHub Advisory vom 2026-03-08 mit PoC github.com
CVE: CVE-2026-4558
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.