Advisory Details

June 25th, 2025

TeamViewer Incorrect Permission Assignment Local Privilege Escalation Vulnerability

ZDI-25-419
ZDI-CAN-26660

CVE ID CVE-2025-36537
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS TeamViewer
AFFECTED PRODUCTS TeamViewer
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of TeamViewer. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the TeamViewer service, which listens on TCP port 5939 by default. The issue results from incorrect permissions on folders. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

ADDITIONAL DETAILS TeamViewer has issued an update to correct this vulnerability. More details can be found at:
https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2025-1002/
DISCLOSURE TIMELINE
  • 2025-03-30 - Vulnerability reported to vendor
  • 2025-06-25 - Coordinated public release of advisory
  • 2025-06-25 - Advisory Updated
CREDIT Giuliano Sanfins(0x_alibabas) from SiDi
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