Out-of-bounds Read in Microsoft Windows
CVE-2021-21989
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 r…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (36.7th 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-2021-21989?
- CVE-2021-21989 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-2021-21989?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-21989 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.