How severe is CVE-2021-33061?

CVE-2021-33061 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-2021-33061 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33061?

CVE-2021-33061 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-2021-33061?

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

When was CVE-2021-33061 published?

CVE-2021-33061 was published on 2022-02-09 and last updated on 2026-06-17.

CVE-2021-33061

CVE-2021-33061 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Intel 82599en Firmware
Published: 2022-02-09
Last modified: 2026-06-17

Description

Insufficient control flow management 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-2021-33061?: Insufficient control flow management 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-2021-33061?: CVE-2021-33061 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-2021-33061 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33061?: CVE-2021-33061 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-2021-33061?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33061 published?: CVE-2021-33061 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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CVE-2021-33096 — Medium (CVSS 5.5): Improper isolation of shared resources in network on chip for the Intel(R) 82599 Ethernet Controllers and Adapters may…

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