CVE-2019-8834

Name: CVE-2019-8834
Creator: NVD / NIST
Published: 2020-10-27T20:15:20.597+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.16%

Last modified Jun 17, 2026

CVE-2019-8834 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A configuration issue was addressed with additional restrictions. This issue is fixed in tvOS 13.3, watchOS 6.1.1, iCloud for Windows 10.9, macOS Catalina 10.15.2, Security Update 2019-002 Mojave, and Security Update 2019-007 High Sierra, iOS 13.3 and iPadOS 13.3, iTunes 12.10.3 for Windows, iCloud for Windows 7.16. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

A configuration issue was addressed with additional restrictions. This issue is fixed in tvOS 13.3, watchOS 6.1.1, iCloud for Windows 10.9, macOS Catalina 10.15.2, Security Update 2019-002 Mojave, and Security Update 2019-007 High Sierra, iOS 13.3 and iPadOS 13.3, iTunes 12.10.3 for Windows, iCloud for Windows 7.16. An attacker in a privileged network position may be able to bypass HSTS for a limited number of specific top-level domains previously not in the HSTS preload list.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

1.16%

63.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.16
Apple	Icloud	>= 10.0, < 10.9
Apple	Itunes	< 12.10.3
Apple	Ipados	< 13.3
Apple	Iphone Os	< 13.3
Apple	Mac Os X	< 10.15.2
Apple	Tvos	< 13.3
Apple	Watchos	< 6.1.1

References

https://support.apple.com/en-us/HT210785Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210788Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210789Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210790Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210793Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210794Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210795Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210785Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210788Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210789Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210790Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210793Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210794Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT210795Release Notes, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2019-8834?

How severe is CVE-2019-8834?

CVE-2019-8834 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8834?

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-2019-8834?

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

Scan your code now

Source: NVD / NIST