What is CVE-2021-33149?

CVE-2021-33149 is a medium-severity vulnerability in Intel Atom Processors, classified under Observable Discrepancy. CVSS score: 5.5/10. Published 2022-05-12.

How severe is CVE-2021-33149?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Intel Atom Processors

CVE-2021-33149

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

Published 2022-05-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (14.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00648.html (Vendor Advisory)
security.netapp.com/advisory/ntap-20220818-0002/ (Third Party Advisory)

Frequently asked questions

What is CVE-2021-33149?: CVE-2021-33149 is a medium-severity vulnerability in Intel Atom Processors, classified under Observable Discrepancy. CVSS score: 5.5/10. Published 2022-05-12.
How severe is CVE-2021-33149?: Medium severity. CVSS v3 base score is 5.5 out of 10.