Cisco Nexus: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit Administratorrechten
WID-SEC-2026-3157 · first 03.09.2026 · updated 03.09.2026 · CVSS 9,8
What it is about
Bei der Cisco Nexus Serie handelt es sich um modulare Switching-Systeme der Data Center-Klasse. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco Nexus ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen.
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
- beliebigen Programmcode mit Administratorrechten auszuführen
Am I affected?
Affected according to the BSI:
- Cisco Nexus 9000 Series Switches
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Install the updates provided by the vendor; details in the sources below.
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)
- Cisco Security Advisory cisco-sa-n9k-s1-rce-EH8dEtr vom 2026-09-02 sec.cloudapps.cisco.com
CVE: CVE-2026-20212
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.