How severe is CVE-2021-33142?

CVE-2021-33142 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-33142 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33142?

CVE-2021-33142 primarily affects Intel Ethernet Controller I225-it Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33142?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2021-33142 have an EU (EUVD) identifier?

Yes. CVE-2021-33142 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-19857.

When was CVE-2021-33142 published?

CVE-2021-33142 was published on 2024-02-23 and last updated on 2026-06-17.

CVE-2021-33142

CVE-2021-33142 is a medium-severity vulnerability in Intel Ethernet Controller I225-it Firmware with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-19857
Weakness: CWE-20
Affected product: Intel Ethernet Controller I225-it Firmware
Published: 2024-02-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-33142?: 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.
How severe is CVE-2021-33142?: CVE-2021-33142 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-33142 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33142?: CVE-2021-33142 primarily affects Intel Ethernet Controller I225-it Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33142?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-33142 have an EU (EUVD) identifier?: Yes. CVE-2021-33142 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-19857.
When was CVE-2021-33142 published?: CVE-2021-33142 was published on 2024-02-23 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00756.html

Affected products (4)

cpe:2.3:o:intel:ethernet_controller_i225-it_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:ethernet_controller_i225-lm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:ethernet_controller_i225-v_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:intel:ethernet_adapter_complete_driver:*:*:*:*:*:*:*:*

More vulnerabilities in Intel Ethernet Controller I225-it Firmware

CVE-2021-33141 — High (CVSS 8.6): Improper input validation in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability…
CVE-2021-33162 — High (CVSS 8.4): Improper access control in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware…
CVE-2022-37341 — High (CVSS 7.2): Improper access control in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware…
CVE-2021-33161 — High (CVSS 7.2): Improper input validation in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability…
CVE-2021-33158 — High (CVSS 7.2): Improper neutralization in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware…
CVE-2021-33157 — High (CVSS 7.2): Insufficient control flow management in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225…

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