CVE-2021-21988: VMware Horizon Client

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

VMware Workstation (16.x prior to 16.1.2) and Horizon Client for Windows (5.x prior to 5.5.2) contain out-of-bounds read vulnerability in the Cortado ThinPrint component (JPEG2000 Parser). A malicious actor with access to a virtual machine or remote desktop may be able to exploit these issues leading to information disclosure from the TPView process running on the system where Workstation or Horizon Client for Windows is installed.

Affected products

• VMware Horizon Client: from 5.0.0, before 5.5.2 (fixed in 5.5.2)
• VMware Workstation: from 16.0.0, before 16.1.2 (fixed in 16.1.2)

Published 2021-05-24. Last modified 2026-06-17.