Cisco WebEx App: Schwachstelle ermöglicht Darstellen falscher Informationen
WID-SEC-2026-1988 · first 18.06.2026 · updated 18.06.2026 · CVSS 4,3
What it is about
Der WebEx Meeting Service ist ein Multimedia Konferenz System von Cisco. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco WebEx App ausnutzen, um falsche Informationen darzustellen.
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
- falsche Informationen darzustellen
Am I affected?
Affected according to the BSI:
- Cisco WebEx App
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-webex-app-redirect-KOyxhffH vom 2026-06-17 sec.cloudapps.cisco.com
CVE: CVE-2026-20178
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.