TeamViewer: Schwachstelle ermöglicht Privilegieneskalation
WID-SEC-2026-1651 · first 22.05.2026 · updated 26.05.2026 · CVSS 5,4
What it is about
TeamViewer ist eine Fernzugriffs- und Fernsteuerungssoftware, die die Wartung von Computern und anderen Geräten ermöglicht. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in TeamViewer ausnutzen, um seine Privilegien zu erhöhen.
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
- seine Privilegien zu erhöhen
Am I affected?
Affected according to the BSI:
- TeamViewer TeamViewer DEX Platform <9.2
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- TeamViewer TeamViewer DEX Platform 9.2
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)
- TeamViewer Security Advisory TV-2026-1005 vom 2026-05-22 www.teamviewer.com
CVE: CVE-2026-8381
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.