CVE-2021-21987 json
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 t…
published 2021-05-24 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9158
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- vmware workstation 16.1.2
- vmware horizon_client 5.5.2
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- n/a VMware Workstation Pro / Player (Workstation), VMware Horizon Client for Windows
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
- Technology feeds
References
-
vmware.com
/security/advisories/VMSA-2021-0009.html
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-608/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-21987
- NVD CVE-2021-21987
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