How severe is CVE-2020-0523?

CVE-2020-0523 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-2020-0523 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-0523?

CVE-2020-0523 affects Intel Ethernet Controller I210 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-0523?

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

When was CVE-2020-0523 published?

CVE-2020-0523 was published on 2021-02-17 and last updated on 2026-06-17.

CVE-2020-0523

CVE-2020-0523 is a medium-severity vulnerability in Intel Ethernet Controller I210 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.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v2: 2.1
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Intel Ethernet Controller I210 Firmware
Published: 2021-02-17
Last modified: 2026-06-17

Description

Improper access control in the firmware for the Intel(R) Ethernet I210 Controller series of network adapters before version 3.30 may potentially allow a privileged user to enable a denial of service via local access.

Frequently asked questions

What is CVE-2020-0523?: Improper access control in the firmware for the Intel(R) Ethernet I210 Controller series of network adapters before version 3.30 may potentially allow a privileged user to enable a denial of service via local access.
How severe is CVE-2020-0523?: CVE-2020-0523 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-2020-0523 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-0523?: CVE-2020-0523 affects Intel Ethernet Controller I210 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-0523?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-0523 published?: CVE-2020-0523 was published on 2021-02-17 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00318.html

Affected products (1)

cpe:2.3:o:intel:ethernet_controller_i210_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Intel Ethernet Controller I210 Firmware

CVE-2020-0524 — Medium (CVSS 5.5): Improper default permissions in the firmware for the Intel(R) Ethernet I210 Controller series of network adapters…
CVE-2020-0525 — Medium (CVSS 4.4): Improper access control in firmware for the Intel(R) Ethernet I210 Controller series of network adapters before version…
CVE-2020-0522 — Medium (CVSS 4.4): Improper initialization in the firmware for the Intel(R) Ethernet I210 Controller series of network adapters before…

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