Is CVE-2021-33126 in the CISA KEV catalog?

No. CVE-2021-33126 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33126?

CVE-2021-33126 has a CVSS v3 base score of 4.4 (MEDIUM).

What is the EPSS score for CVE-2021-33126?

CVE-2021-33126 has an EPSS score of 0.19% (9th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33126?

Upgrade ethernet controller v710 firmware to 8.5 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2021-33126

MEDIUM

4.4

CVSS v3

NVD

Description

Improper access control in the firmware for some Intel(R) 700 and 722 Series Ethernet Controllers and Adapters before versions 8.5 and 1.5.5 may allow a privileged user to potentially enable denial of service via local access.

How to fix

Remediation Available

ethernet controller v710 firmwareNVD

Affected:< 8.5Fixed in:8.5CVE-2021-33126derived from NVD

ethernet controller x710 firmwareNVD

Affected:< 8.5Fixed in:8.5CVE-2021-33126derived from NVD

ethernet controller xl710 firmwareNVD

Affected:< 8.5Fixed in:8.5CVE-2021-33126derived from NVD

ethernet controller xxv710 firmwareNVD

Affected:< 8.5Fixed in:8.5CVE-2021-33126derived from NVD

ethernet network adapter x722da2 firmwareNVD

Affected:< 1.5.5Fixed in:1.5.5CVE-2021-33126derived from NVD

ethernet network adapter x722da4fh firmwareNVD

Affected:< 1.5.5Fixed in:1.5.5CVE-2021-33126derived from NVD

ethernet network adapter x722da4g1p5 firmwareNVD

Affected:< 1.5.5Fixed in:1.5.5CVE-2021-33126derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.19%probability of exploitation in 30 days

9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Patch1

intel.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-05.