Is CVE-2020-3989 in the CISA KEV catalog?

No. CVE-2020-3989 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3989?

CVE-2020-3989 has a CVSS v3 base score of 3.3 (LOW).

What is the EPSS score for CVE-2020-3989?

CVE-2020-3989 has an EPSS score of 0.29% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3989?

Upgrade horizon client to 5.4.4 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-3989

LOW

3.3

CVSS v3

NVD

Description

VMware Workstation (15.x) and Horizon Client for Windows (5.x before 5.4.4) contain a denial of service vulnerability due to an out-of-bounds write issue in Cortado ThinPrint component. A malicious actor with normal access to a virtual machine may be able to exploit this issue to create a partial denial-of-service condition on the system where Workstation or Horizon Client for Windows is installed. Exploitation is only possible if virtual printing has been enabled. This feature is not enabled by default on Workstation but it is enabled by default on Horizon Client.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

horizon clientNVD

Affected:>= 5.0.0, < 5.4.4Fixed in:5.4.4CVE-2020-3989derived from NVD

workstation playerNVD

Affected:>= 15.0.0, < 16.0.0Fixed in:16.0.0CVE-2020-3989derived from NVD

workstation proNVD

Affected:>= 15.0.0, < 16.0.0Fixed in:16.0.0CVE-2020-3989derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Vendor Advisory1

vmware.com

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.