CVE-2019-8656

Name: CVE-2019-8656
Creator: NVD / NIST
Published: 2020-10-27T20:15:17.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.49%

Last modified Jun 17, 2026

CVE-2019-8656 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. This was addressed with additional checks by Gatekeeper on files mounted through a network share. This issue is fixed in macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra. EPSS estimates a 1.49% chance of exploitation in the next 30 days.

Description

This was addressed with additional checks by Gatekeeper on files mounted through a network share. This issue is fixed in macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra. Extracting a zip file containing a symbolic link to an endpoint in an NFS mount that is attacker controlled may bypass Gatekeeper.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.49%

70.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.14.6

References

https://support.apple.com/en-us/HT210348Vendor Advisory
https://support.apple.com/en-us/HT210348Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2019-8656?

How severe is CVE-2019-8656?

CVE-2019-8656 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.49% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8656?

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-2019-8656?

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

Scan your code now

Source: NVD / NIST