Cisco Jabber: Schwachstelle ermöglicht Manipulation von Dateien
WID-SEC-2026-3812 · first 08.10.2026 · updated 08.10.2026 · CVSS 4,0
What it is about
Cisco Jabber ist eine Lösung für Instant Messaging, Voice- und Video-Telefonie. Ein lokaler Angreifer kann eine Schwachstelle in Cisco Jabber ausnutzen, um Dateien zu manipulieren.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- Dateien zu manipulieren
Am I affected?
Affected according to the BSI:
- Cisco Jabber <15.3.1.311364
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Cisco Jabber 15.3.1.311364
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 2026-10-07 github.com
- VulnCheck vom 2026-10-07 www.vulncheck.com
CVE: CVE-2026-101886
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.