Is CVE-2021-22045 in the CISA KEV catalog?

No. CVE-2021-22045 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22045?

CVE-2021-22045 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-22045?

CVE-2021-22045 has an EPSS score of 4.68% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22045?

Upgrade fusion to 12.2.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-22045

HIGHEPSS 91th pctl

7.8

CVSS v3

NVD

Description

VMware ESXi (7.0, 6.7 before ESXi670-202111101-SG and 6.5 before ESXi650-202110101-SG), VMware Workstation (16.2.0) and VMware Fusion (12.2.0) contains a heap-overflow vulnerability in CD-ROM device emulation. A malicious actor with access to a virtual machine with CD-ROM device emulation may be able to exploit this vulnerability in conjunction with other issues to execute code on the hypervisor from a virtual machine.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

fusionNVD

Affected:>= 12.0.0, < 12.2.0Fixed in:12.2.0CVE-2021-22045derived from NVD

workstationNVD

Affected:>= 16.0.0, < 16.2.0Fixed in:16.2.0CVE-2021-22045derived 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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.68%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Vendor Advisory1

vmware.com

Third-Party Advisory2

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.