What is CVE-2020-8743?

CVE-2020-8743 is a high-severity vulnerability in Intel Mailbox Interface Driver, classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2020-08-13.

How severe is CVE-2020-8743?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Intel Mailbox Interface Driver

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.

Published 2020-08-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Intel Mailbox Interface Driver
Intel(r) Mailbox Interface Driver Advisory — versions all versions

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00394.html (Vendor Advisory)

Frequently asked questions

What is CVE-2020-8743?: CVE-2020-8743 is a high-severity vulnerability in Intel Mailbox Interface Driver, classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2020-08-13.
How severe is CVE-2020-8743?: High severity. CVSS v3 base score is 7.8 out of 10.