How severe is CVE-2021-33120?

CVE-2021-33120 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2021-33120 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33120?

CVE-2021-33120 primarily affects Intel Atom P5942b Firmware. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33120?

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

When was CVE-2021-33120 published?

CVE-2021-33120 was published on 2022-02-09 and last updated on 2026-06-17.

CVE-2021-33120

CVE-2021-33120 is a medium-severity vulnerability in Intel Atom P5942b Firmware with a CVSS 3.x base score of 5.4. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 5.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Intel Atom P5942b Firmware
Published: 2022-02-09
Last modified: 2026-06-17

Description

Out of bounds read under complex microarchitectural condition in memory subsystem for some Intel Atom(R) Processors may allow authenticated user to potentially enable information disclosure or cause denial of service via network access.

Frequently asked questions

What is CVE-2021-33120?: Out of bounds read under complex microarchitectural condition in memory subsystem for some Intel Atom(R) Processors may allow authenticated user to potentially enable information disclosure or cause denial of service via network access.
How severe is CVE-2021-33120?: CVE-2021-33120 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2021-33120 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33120?: CVE-2021-33120 primarily affects Intel Atom P5942b Firmware. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33120?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33120 published?: CVE-2021-33120 was published on 2022-02-09 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00589.html

Affected products (25)

cpe:2.3:o:intel:atom_p5942b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_p5931b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_p5962b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_p5921b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_d1700_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_d2700_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:core_i5-l16g7_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:core_i3-l13g4_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:pentium_j6425_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:pentium_n6415_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_j6413_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_n6211_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6413e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6425re_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6427fe_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6212re_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6200fe_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6211e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:atom_x6425e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:pentium_silver_n6005_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:pentium_silver_n6000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_n4505_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_n4500_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_n5105_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:celeron_n5100_firmware:-:*:*:*:*:*:*:*

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