How severe is CVE-2021-33149?

CVE-2021-33149 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 high, integrity none, and availability none.

Is CVE-2021-33149 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-2021-33149?

CVE-2021-33149 primarily affects Intel Core Processors Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33149?

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

When was CVE-2021-33149 published?

CVE-2021-33149 was published on 2022-05-12 and last updated on 2026-06-17.

CVE-2021-33149

CVE-2021-33149 is a medium-severity vulnerability in Intel Core Processors 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-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Intel Core Processors Firmware
Published: 2022-05-12
Last modified: 2026-06-17

Description

Observable behavioral discrepancy in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.

Frequently asked questions

What is CVE-2021-33149?: Observable behavioral discrepancy in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
How severe is CVE-2021-33149?: CVE-2021-33149 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 high, integrity none, and availability none.
Is CVE-2021-33149 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-2021-33149?: CVE-2021-33149 primarily affects Intel Core Processors Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33149?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33149 published?: CVE-2021-33149 was published on 2022-05-12 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:intel:core_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:pentium_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:itanium_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_phi_processors_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:quark_soc_firmware:-:*:*:*:*:*:*:*

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