Integer underflow in Digital Employee Experience (DEX) Client for Windows - CVE-2026-23567
Published: January 30, 2026
Vulnerability identifier: #VU122141
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-23567
CWE-ID: CWE-191
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: TeamViewer
Affected software:
Digital Employee Experience (DEX) Client for Windows
Digital Employee Experience (DEX) Client for Windows
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer underflow in Content Distribution Service UDP handler. A remote attacker on the local network can send a specially crafted request to the affected application, trigger integer underflow and cause a denial of service condition on the target system.
How to mitigate CVE-2026-23567
Install updates from vendor's website.