Is CVE-2021-33158 in the CISA KEV catalog?

No. CVE-2021-33158 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33158?

CVE-2021-33158 has a CVSS v3 base score of 7.2 (HIGH).

What is the EPSS score for CVE-2021-33158?

CVE-2021-33158 has an EPSS score of 0.21% (12th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33158?

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

CVE & CISA-KEV Catalog

CVE-2021-33158

HIGH

7.2

CVSS v3

NVD

Description

Improper neutralization in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware may allow a privileged user to potentially enable escalation of privilege via local access.

CWE-86

How to fix

Remediation Available

ethernet adapter complete driverNVD

Affected:< 29.0.1Fixed in:29.0.1CVE-2021-33158derived from NVD

ethernet controller i225-it firmwareNVD

Affected:< 1.87Fixed in:1.87CVE-2021-33158derived from NVD

ethernet controller i225-lm firmwareNVD

Affected:< 1.87Fixed in:1.87CVE-2021-33158derived from NVD

ethernet controller i225-v firmwareNVD

Affected:< 1.87Fixed in:1.87CVE-2021-33158derived 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 RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.21%probability of exploitation in 30 days

12thpercentile

Low risk: more likely to be exploited than 12% of all known CVEs.

References

Vendor Advisory1

intel.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 2026-01-09.