What’s Vulnerable › Vulnerabilities

CVE-2020-13699

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 25.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-29 · updated 2026-06-17
• Weakness: CWE-88

Description

TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI handlers. A malicious website could launch TeamViewer with arbitrary parameters, as demonstrated by a teamviewer10: --play URL. An attacker could force a victim to send an NTLM authentication request and either relay the request or capture the hash for offline password cracking. This affects teamviewer10, teamviewer8, teamviewerapi, tvchat1, tvcontrol1, tvfiletransfer1, tvjoinv8, tvpresent1, tvsendfile1, tvsqcustomer1, tvsqsupport1, tvvideocall1, and tvvpn1. The issue is fixed in 8.0.258861, 9.0.258860, 10.0.258873, 11.0.258870, 12.0.258869, 13.2.36220, 14.2.56676, 14.7.48350, and 15.8.3.

Affected products

• TeamViewer: before 15.8.3 — fixed in 15.8.3

How to fix

Upgrade to a fixed version: TeamViewer 15.8.3. Check the vendor advisory for mitigations.

References

• https://community.teamviewer.com/t5/Announcements/Statement-on-CVE-2020-13699/td-p/98448
• https://jeffs.sh/CVEs/CVE-2020-13699.txt
• https://community.teamviewer.com/t5/Announcements/Statement-on-CVE-2020-13699/td-p/98448
• https://jeffs.sh/CVEs/CVE-2020-13699.txt

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