CVE-2021-21988: vmware horizon_client Out-of-bounds Read
Vulnerability summary
CVE-2021-21988 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in vmware horizon_client. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.9% of scored vulnerabilities.
Timeline
- 24-05-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.45%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
0.00 pp
From 0.45% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Vmware2 products
- horizon_client≥ 5.0.0, < 5.5.2
- workstation≥ 16.0.0, < 16.1.2
1 vendor · 2 products