Improper input validation in Microsoft Windows
CVE-2026-23571
A command injection vulnerability was discovered in TeamViewer DEX (former 1E DEX), specifically within the 1E-Nomad-RunPkgStatusRequest instruction. Improper input validation allows authenticated attackers with actioner privilege to run elevated arbitrary commands on connected hosts via malicious commands injected into the instruction’s input field. Users of 1E Client version 24.5 or higher are not affected.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.007 (47.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- psirt@teamviewer.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-23571?
- CVE-2026-23571 is a medium-severity vulnerability in Microsoft Windows, classified under Improper Input Validation. CVSS score: 6.8/10. Published 2026-01-29.
- How severe is CVE-2026-23571?
- Medium severity. CVSS v3 base score is 6.8 out of 10.