How severe is CVE-2020-8743?

CVE-2020-8743 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8743 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-2020-8743?

CVE-2020-8743 affects Intel Mailbox Interface Driver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8743?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-8743 published?

CVE-2020-8743 was published on 2020-08-13 and last updated on 2026-06-17.

CVE-2020-8743

CVE-2020-8743 is a high-severity vulnerability in Intel Mailbox Interface Driver with a CVSS 3.x base score of 7.8. 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-276.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Intel Mailbox Interface Driver
Published: 2020-08-13
Last modified: 2026-06-17

Description

Improper permissions in the installer for the Intel(R) Mailbox Interface driver, all versions, may allow an authenticated user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2020-8743?: Improper permissions in the installer for the Intel(R) Mailbox Interface driver, all versions, may allow an authenticated user to potentially enable escalation of privilege via local access.
How severe is CVE-2020-8743?: CVE-2020-8743 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8743 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-2020-8743?: CVE-2020-8743 affects Intel Mailbox Interface Driver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8743?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-8743 published?: CVE-2020-8743 was published on 2020-08-13 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00394.html

Affected products (1)

cpe:2.3:a:intel:mailbox_interface_driver:*:*:*:*:*:*:*:*

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