SB2026013032 - Multiple vulnerabilities in TeamViewer Digital Employee Experience (DEX) Client
Published: January 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 9 secuirty vulnerabilities.
1) Cleartext transmission of sensitive information (CVE-ID: CVE-2026-23564)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to software uses insecure communication channel to transmit sensitive information in Content Distribution Service. A remote attacker on the local network can gain access to sensitive data.
2) NULL pointer dereference (CVE-ID: CVE-2026-23565)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in Content Distribution Service. A remote attacker on the local network can pass specially crafted data to the application and perform a denial of service (DoS) attack.
3) Input validation error (CVE-ID: CVE-2026-23566)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the Log injection issue in Content Distribution Service UDP Handler. A remote attacker on the local network can send specially crafted data to the UDP network handler and impact log integrity and nonrepudiation.
4) Integer underflow (CVE-ID: CVE-2026-23567)
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.
5) Out-of-bounds read (CVE-ID: CVE-2026-23568)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Content Distribution Service. A remote attacker on the local network can trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.
6) Out-of-bounds read (CVE-ID: CVE-2026-23569)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in Content Distribution Service. A remote attacker on the local network can trigger an out-of-bounds read error and cause a denial of service condition on the system.
7) Input validation error (CVE-ID: CVE-2026-23570)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to missing validation of a user-controlled value in Content Distribution Service. A remote attacker on the local network can use specially crafted UDP Sync command to tamper with log timestamps.
8) Command Injection (CVE-ID: CVE-2026-23571)
The vulnerability allows a remote user to execute arbitrary commands on the system.
The vulnerability exists due to insufficient input validation in the 1E-Nomad-RunPkgStatusRequest instruction. A remote administrator can pass specially crafted data to the application and execute arbitrary commands.
9) Link following (CVE-ID: CVE-2026-23563)
The vulnerability allows a remote user to compromise the target system.
The vulnerability exists due to an insecure link following issue within DeleteFileByPath instruction. A remote administrator can create a specially crafted symbolic link to a critical file on the system and delete protected system files.
Remediation
Install update from vendor's website.