How severe is CVE-2021-33096?

CVE-2021-33096 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-33096 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33096?

CVE-2021-33096 primarily affects Intel 82599en Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33096?

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

When was CVE-2021-33096 published?

CVE-2021-33096 was published on 2022-02-09 and last updated on 2026-06-17.

CVE-2021-33096

CVE-2021-33096 is a medium-severity vulnerability in Intel 82599en Firmware with a CVSS 3.x base score of 5.5. 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-668.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Intel 82599en Firmware
Published: 2022-02-09
Last modified: 2026-06-17

Description

Improper isolation of shared resources in network on chip for the Intel(R) 82599 Ethernet Controllers and Adapters may allow an authenticated user to potentially enable denial of service via local access.

Frequently asked questions

What is CVE-2021-33096?: Improper isolation of shared resources in network on chip for the Intel(R) 82599 Ethernet Controllers and Adapters may allow an authenticated user to potentially enable denial of service via local access.
How severe is CVE-2021-33096?: CVE-2021-33096 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-33096 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33096?: CVE-2021-33096 primarily affects Intel 82599en Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33096?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33096 published?: CVE-2021-33096 was published on 2022-02-09 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:intel:82599en_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:82599eb_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:82599es_firmware:*:*:*:*:*:*:*:*

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