Out-of-bounds Read in Microsoft Windows
CVE-2021-21987
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 (TTC 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.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (44.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Microsoft Windows
- Vmware Horizon_client
- Vmware Workstation
- N/a Vmware Workstation Pro / Player (Workstation), Horizon Client For Windows — versions VMware Workstation (16.x prior to 16.1.2) and Horizon Client for Windows (5.x prior to 5.5.2)
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@vmware.com (Patch, x_refsource_MISC, Vendor Advisory)
- security@vmware.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-21987?
- CVE-2021-21987 is a medium-severity vulnerability in Microsoft Windows, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2021-05-24.
- How severe is CVE-2021-21987?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-21987 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.