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[UPDATE] [medium] TeamViewer: Vulnerability allows unspecified attack

medium
TeamViewer has fixed an unspecified vulnerability in its cloud service. This affects the 'out-of-session chat' functionality of the Full Client.

CSIRTS triage

vendor: TeamViewerproduct: TeamViewerOther
What
TeamViewer has fixed an unspecified vulnerability in its cloud service.
Who is affected
Users of TeamViewer's Full Client are affected.
Urgency
Remediation is medium urgency due to the unspecified nature of the vulnerability.
Action
Update to the latest version of TeamViewer.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-07-03
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2139

Recent advisories for TeamViewer

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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