What is CVE-2026-23565?

CVE-2026-23565 is a medium-severity vulnerability in Microsoft Windows, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-01-29.

How severe is CVE-2026-23565?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Microsoft Windows

CVE-2026-23565

A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to cause the NomadBranch.exe process to terminate via cr…

EPSS: 0.002 (6.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Microsoft Windows
Teamviewer Dex — versions 0
Teamviewer Digital_employee_experience

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

psirt@teamviewer.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-23565?: CVE-2026-23565 is a medium-severity vulnerability in Microsoft Windows, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-01-29.
How severe is CVE-2026-23565?: Medium severity. CVSS v3 base score is 6.5 out of 10.