How severe is CVE-2021-0009?

CVE-2021-0009 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-0009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0009?

CVE-2021-0009 affects Intel Ethernet Controller E810 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-0009?

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

When was CVE-2021-0009 published?

CVE-2021-0009 was published on 2021-08-11 and last updated on 2026-06-17.

CVE-2021-0009

CVE-2021-0009 is a medium-severity vulnerability in Intel Ethernet Controller E810 Firmware with a CVSS 3.x base score of 6.5. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Intel Ethernet Controller E810 Firmware
Published: 2021-08-11
Last modified: 2026-06-17

Description

Out-of-bounds read in the firmware for Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow an unauthenticated user to potentially enable denial of service via adjacent access.

Frequently asked questions

What is CVE-2021-0009?: Out-of-bounds read in the firmware for Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow an unauthenticated user to potentially enable denial of service via adjacent access.
How severe is CVE-2021-0009?: CVE-2021-0009 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-0009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-0009?: CVE-2021-0009 affects Intel Ethernet Controller E810 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-0009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-0009 published?: CVE-2021-0009 was published on 2021-08-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:intel:ethernet_controller_e810_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Intel Ethernet Controller E810 Firmware

CVE-2021-0084 — High (CVSS 7.8): Improper input validation in the Intel(R) Ethernet Controllers X722 and 800 series Linux RMDA driver before version…
CVE-2021-0002 — High (CVSS 7.1): Improper conditions check in some Intel(R) Ethernet Controllers 800 series Linux drivers before version 1.4.11 may…
CVE-2021-0003 — Medium (CVSS 5.5): Improper conditions check in some Intel(R) Ethernet Controllers 800 series Linux drivers before version 1.4.11 may…
CVE-2022-28709 — Medium (CVSS 4.4): Improper access control in the firmware for some Intel(R) E810 Ethernet Controllers before version 1.6.1.9 may allow a…
CVE-2021-33128 — Medium (CVSS 4.4): Improper access control in the firmware for some Intel(R) E810 Ethernet Controllers before version 1.6.0.6 may allow a…
CVE-2021-0008 — Medium (CVSS 4.4): Uncontrolled resource consumption in firmware for Intel(R) Ethernet Adapters 800 Series Controllers and associated…

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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