Is CVE-2021-22043 in the CISA KEV catalog?

No. CVE-2021-22043 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22043?

CVE-2021-22043 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-22043?

CVE-2021-22043 has an EPSS score of 1.03% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22043?

Upgrade fusion to 4.4 or later.

CVE & CISA-KEV Catalog

CVE-2021-22043

HIGH

7.5

CVSS v3

NVD

Description

VMware ESXi contains a TOCTOU (Time-of-check Time-of-use) vulnerability that exists in the way temporary files are handled. A malicious actor with access to settingsd, may exploit this issue to escalate their privileges by writing arbitrary files.

CWE-367TOCTOU Race Condition

How to fix

Remediation Available

fusionNVD

Affected:< 4.4Fixed in:4.4CVE-2021-22043derived 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 VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.03%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Patch1

vmware.com

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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.