CVE-2021-34803: TeamViewer

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

TeamViewer before 14.7.48644 on Windows loads untrusted DLLs in certain situations.

Affected products

• TeamViewer TeamViewer: before 9.0.259145 (fixed in 9.0.259145); from 10.0.2551, before 10.0.259144 (fixed in 10.0.259144); from 11.0.90968, before 11.0.259143 (fixed in 11.0.259143); from 12.0.92876, before 12.0.259142 (fixed in 12.0.259142); from 13.0.5058, before 13.2.36222 (fixed in 13.2.36222); from 14.0.8346, before 14.2.56678 (fixed in 14.2.56678); …

Published 2021-06-16. Last modified 2026-06-17.