Is CVE-2021-33142 in the CISA KEV catalog?

No. CVE-2021-33142 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33142?

CVE-2021-33142 has a CVSS v3 base score of 6.0 (MEDIUM).

What is the EPSS score for CVE-2021-33142?

CVE-2021-33142 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33142?

Upgrade ethernet adapter complete driver to 29.0.1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-33142

MEDIUM

6.0

CVSS v3

NVD

Description

Improper input validation in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware may allow a privileged user to potentially enable denial of service via local access.

CWE-20Improper Input Validation

How to fix

Remediation Available

ethernet adapter complete driverNVD

Affected:< 29.0.1Fixed in:29.0.1CVE-2021-33142derived from NVD

ethernet controller i225-it firmwareNVD

Affected:< 1.87Fixed in:1.87CVE-2021-33142derived from NVD

ethernet controller i225-lm firmwareNVD

Affected:< 1.87Fixed in:1.87CVE-2021-33142derived from NVD

ethernet controller i225-v firmwareNVD

Affected:< 1.87Fixed in:1.87CVE-2021-33142derived 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 RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Vendor Advisory1

intel.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	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 2026-01-09.