Cisco Catalyst SD-WAN Manager: Mehrere Schwachstellen
WID-SEC-2026-2676 · first 06.08.2026 · updated 06.08.2026 · CVSS 9,9
What it is about
Cisco Catalyst SD-WAN ist eine Netzwerklösung, die Software-definierte Wide-Area-Networking-Funktionen (SD-WAN) mit Cisco Catalyst Series Switches kombiniert, um die Netzwerkleistung an verteilten Standorten zu optimieren und zu sichern. Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Cisco Catalyst SD-WAN Manager ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder Berechtigungen zu erweitern.
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 Code auszuführen
- Sicherheitsmaßnahmen zu umgehen
- vertrauliche Informationen offenzulegen
- Daten zu manipulieren oder Berechtigungen zu erweitern
Am I affected?
Affected according to the BSI:
- Cisco Catalyst SD-WAN Manager <20.9.10
- Cisco Catalyst SD-WAN Manager <20.12.8.1
- Cisco Catalyst SD-WAN Manager <20.15.6
- Cisco Catalyst SD-WAN Manager <20.18.4
- Cisco Catalyst SD-WAN Manager <26.1.2
- Cisco Catalyst SD-WAN Manager <20.12.8
- Cisco Catalyst SD-WAN Manager <26.2.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Cisco Catalyst SD-WAN Manager 20.9.10
- Cisco Catalyst SD-WAN Manager 20.12.8.1
- Cisco Catalyst SD-WAN Manager 20.15.6
- Cisco Catalyst SD-WAN Manager 20.18.4
- Cisco Catalyst SD-WAN Manager 26.1.2
- Cisco Catalyst SD-WAN Manager 20.12.8
- Cisco Catalyst SD-WAN Manager 26.2.1
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-hardening-sdwan-faLcR3K vom 2026-08-05 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-sdwan-infodis-SPuJBDCe vom 2026-08-05 sec.cloudapps.cisco.com
CVE: CVE-2026-20303, CVE-2026-20304, CVE-2026-20310, CVE-2026-20312, CVE-2026-20313, CVE-2026-20294
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.