CVE-2019-8642

Name: CVE-2019-8642
Creator: NVD / NIST
Published: 2020-10-27T20:15:16.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2019-8642 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. An issue existed in the handling of S-MIME certificates. This issue was addressed with improved validation of S-MIME certificates. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

An issue existed in the handling of S-MIME certificates. This issue was addressed with improved validation of S-MIME certificates. This issue is fixed in macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra. Processing a maliciously crafted mail message may lead to S/MIME signature spoofing.

Metrics

CVSS 3.1

3.3/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

0.31%

23.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.14.4

References

https://support.apple.com/en-us/HT209600Vendor Advisory
https://support.apple.com/en-us/HT209600Vendor Advisory

Timeline

Published: Oct 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-8642?

How severe is CVE-2019-8642?

CVE-2019-8642 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8642?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-8642?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST