CVE-2021-0158

CVE-2021-0158 is a medium-severity vulnerability in Intel Celeron N2805 with a CVSS 3.x base score of 6.7. 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-20.

Key facts

• Severity: Medium (CVSS 3.x base score 6.7)
• CVSS v2: 4.6
• EPSS exploit prediction: 3% (86th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Intel Celeron N2805
• Published: 2021-11-17
• Last modified: 2026-06-17

Description

Improper input validation in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2021-0158?

Improper input validation in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

How severe is CVE-2021-0158?

CVE-2021-0158 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-0158 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0158?

CVE-2021-0158 primarily affects Intel Celeron N2805. In total, 484 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-0158?

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

When was CVE-2021-0158 published?

CVE-2021-0158 was published on 2021-11-17 and last updated on 2026-06-17.

References

• https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00562.html

Affected products (484)

• cpe:2.3:h:intel:celeron_n2805:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2806:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2807:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2808:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2810:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2815:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2820:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2830:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2840:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2910:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2920:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2930:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n2940:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3000:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3010:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3050:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3060:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3150:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3160:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3350:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3350e:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n3450:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n4000:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n4020:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n4100:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n4120:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n4500:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n4505:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n5100:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n5105:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n6210:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:celeron_n6211:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-1000g1:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-1000g4:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-1005g1:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-10100:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-10100e:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-10100f:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-10100t:-:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3-10100te:-:*:*:*:*:*:*:*

More vulnerabilities in Intel Celeron N2805

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• CVE-2021-0157 — Medium (CVSS 6.7): Insufficient control flow management in the BIOS firmware for some Intel(R) Processors may allow a privileged user to…
• CVE-2017-5703 — Medium (CVSS 6.0): Configuration of SPI Flash in platforms based on multiple Intel platforms allow a local attacker to alter the behavior…
• CVE-2020-0551 — Medium (CVSS 5.6): Load value injection in some Intel(R) Processors utilizing speculative execution may allow an authenticated user to…
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