Cisco Catalyst SD-WAN Manager: Schwachstelle ermöglicht Erlangen von Administratorrechten
WID-SEC-2026-3681 · first 01.10.2026 · updated 01.10.2026 · CVSS 9,8
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, anonymer Angreifer kann eine Schwachstelle in Cisco Catalyst SD-WAN Manager ausnutzen, um die Authentifizierung zu umgehen und Administratorrechte zu erlangen.
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
- die Authentifizierung zu umgehen
- Administratorrechte zu erlangen
Am I affected?
Affected according to the BSI:
- Cisco Catalyst SD-WAN Manager <26.2.1
- Cisco Catalyst SD-WAN Manager <20.9.10.1
- Cisco Catalyst SD-WAN Manager <20.12.8.2
- Cisco Catalyst SD-WAN Manager <20.15.6.1
- Cisco Catalyst SD-WAN Manager <20.18.4.1
- Cisco Catalyst SD-WAN Manager <26.1.2.1
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 26.2.1
- Cisco Catalyst SD-WAN Manager 20.9.10.1
- Cisco Catalyst SD-WAN Manager 20.12.8.2
- Cisco Catalyst SD-WAN Manager 20.15.6.1
- Cisco Catalyst SD-WAN Manager 20.18.4.1
- Cisco Catalyst SD-WAN Manager 26.1.2.1
Is the vulnerability already being exploited?
- CVE-2026-76504: exploited in the wild according to CISA, in the catalogue since 30.09.2026.
Information and sources
- Original BSI advisory (WID)
- Cisco Security Advisory cisco-sa-sdwan-webauth-xr8beuuU vom 2026-09-30 sec.cloudapps.cisco.com
- GitHub Security Advisory GHSA-xqjc-v467-8fvf vom 2026-09-30 github.com
CVE: CVE-2026-76504
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.