How severe is CVE-2021-33146?

CVE-2021-33146 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-33146 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33146?

CVE-2021-33146 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-2021-33146?

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

Does CVE-2021-33146 have an EU (EUVD) identifier?

Yes. CVE-2021-33146 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-19861.

When was CVE-2021-33146 published?

CVE-2021-33146 was published on 2024-02-23 and last updated on 2026-06-17.

CVE-2021-33146

CVE-2021-33146 is a medium-severity vulnerability in Intel Ethernet Controller I225-it Firmware with a CVSS 3.x base score of 5.3. 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 5.3)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-19861
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 an unauthenticated user to potentially enable information disclosure via network access.

Frequently asked questions

What is CVE-2021-33146?: Improper input validation in some Intel(R) Ethernet Adapters and Intel(R) Ethernet Controller I225 Manageability firmware may allow an unauthenticated user to potentially enable information disclosure via network access.
How severe is CVE-2021-33146?: CVE-2021-33146 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-33146 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33146?: CVE-2021-33146 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-2021-33146?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-33146 have an EU (EUVD) identifier?: Yes. CVE-2021-33146 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-19861.
When was CVE-2021-33146 published?: CVE-2021-33146 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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