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 6 y ago modified 2026-06-17 4 mo 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 20%
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.

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 Vulns 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.

Summary