How severe is CVE-2021-0004?

CVE-2021-0004 has a CVSS 3.x base score of 4.4, 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-2021-0004 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0004?

CVE-2021-0004 primarily affects Intel Ethernet Controller E810 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-0004?

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

When was CVE-2021-0004 published?

CVE-2021-0004 was published on 2021-08-11 and last updated on 2026-06-17.

CVE-2021-0004

CVE-2021-0004 is a medium-severity vulnerability in Intel Ethernet Controller E810 Firmware with a CVSS 3.x base score of 4.4. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v2: 2.1
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Intel Ethernet Controller E810 Firmware
Published: 2021-08-11
Last modified: 2026-06-17

Description

Improper buffer restrictions in the firmware of Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow a privileged user to potentially enable denial of service via local access.

Frequently asked questions

What is CVE-2021-0004?: Improper buffer restrictions in the firmware of Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow a privileged user to potentially enable denial of service via local access.
How severe is CVE-2021-0004?: CVE-2021-0004 has a CVSS 3.x base score of 4.4, 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-2021-0004 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-0004?: CVE-2021-0004 primarily affects Intel Ethernet Controller E810 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-0004?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-0004 published?: CVE-2021-0004 was published on 2021-08-11 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

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