Improper permissions in the installer for the Intel(R) Mailbox Interface driver, all versions, may allow an authenticated user to potential…

published 2020-08-13 6y ago modified 2026-06-17 4mo ago also EUVD-2020-29591

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

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.

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Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	4.6	AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

n/a Intel(R) Mailbox Interface driver Advisory

Classification

Weakness

CWE-276 Incorrect Default Permissions

References

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

Sources

CVE List CVE-2020-8743
NVD CVE-2020-8743

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.