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TI-2020-03449 Aliases CVE-2020-3951GHSA-gj73-m2qr-829r

Out-of-bounds write in VMware Workstation and Horizon Client for Windows

Priority LOW 18CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

VMware Workstation (15.x before 15.5.2) and Horizon Client for Windows (5.x and prior before 5.4.0) contain a denial-of-service vulnerability due to a heap-overflow issue in Cortado Thinprint. Attackers with non-administrative access to a guest VM with virtual printing enabled may exploit this issue to create a denial-of-service condition of the Thinprint service running on the system where Workstation or Horizon Client is installed.

Why it matters now

EPSS 0.00274 19th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—VMware Workstation and Horizon Client for WindowsVMware Workstation (15.x before 15.5.2) and Horizon Client for Windows (5.x and prior before 5.4.0)—No fix listedCNA
  • VMware Workstation and Horizon Client for Windows Vendor— Affected VMware Workstation (15.x before 15.5.2) and Horizon Client for Windows (5.x and prior before 5.4.0) Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:vmware:horizon_client:*:*:*:*:*:*:*:*5.0.0 to before 5.4.0VulnerableVMware
cpe:2.3:a:vmware:workstation:*:*:*:*:*:*:*:*15.0.0 to before 15.5.2VulnerableVMware
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:vmware:horizon_client:*:*:*:*:*:*:*:* Versions 5.0.0 to before 5.4.0 Vulnerable ·VMware
  • cpe:2.3:a:vmware:workstation:*:*:*:*:*:*:*:* Versions 15.0.0 to before 15.5.2 Vulnerable ·VMware
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3951
  2. 2026-10-03 Alias added: GHSA-gj73-m2qr-829r

References

Advisory 1

  • TI-2020-03448 Improper privilege management in VMware Fusion, VMware Remote Console for Mac and Horizon… KEVCVSS 3.1HIGH 7.8
  • TI-2020-03472 VMware Fusion (11.x before 11.5.5), VMware Remote Console for Mac (11.x and prior before… CVSS 3.1HIGH 7.8
  • TI-2020-03459 Incorrect permission assignment in VMware Horizon Client for Windows CVSS 3.1HIGH 7.8
  • TI-2019-03948 Incorrect permission assignment in VMware Horizon Client for Windows CVSS 3.1HIGH 7.8
  • TI-2018-05086 VMware Horizon Client for Linux (4.x before 4.8.0 and prior) contains a local privilege… CVSS 3.0HIGH 7.8
  • TI-2018-05092 Out-of-bounds read in VMware Horizon 6, Horizon 7, and Horizon Client CVSS 3.0MEDIUM 6.5
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences