Home/CVE/TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI handlers. A malicious website could
CVE

CVE-2020-13699

TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI handlers. A malicious website could

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.

HIGH · CVSS 8.8 EPSS 0.72886
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules11 YARA rules0
⬡

Weakness Classification

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
▤

Affected Products & Versions

1
teamviewer< 15.8.3
◈

Sigma Hunt Rules

11
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumTeamViewer Remote Session
productmediumInstallation of TeamViewer Desktop
productmediumTeamViewer Domain Query By Non-TeamViewer Application
productlowTeamViewer Log File Deleted
productcriticalHackTool - Windows Credential Editor (WCE) Execution
productcriticalWindows Credential Editor Registry
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Jul 2020 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-308-01
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://community.teamviewer.com/t5/Announcements/Statement-on-CVE-2020-13699/td-p/98448Vendor Advisory
https://jeffs.sh/CVEs/CVE-2020-13699.txtThird Party Advisory
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