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Vulnerability record · CVE-2019-8749 · published 27 October 2020

CVE-2019-8749: Apple icloud out-of-bounds write vulnerability

Apple · Icloud

Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Catalina 10.15, iOS 13, iCloud for Windows 7.14, iCloud for Windows 10.7, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, watchOS 6, iTunes 12.10.1 for Windows. Multiple issues in libxml2.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.9% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Catalina 10.15, iOS 13, iCloud for Windows 7.14, iCloud for Windows 10.7, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, watchOS 6, iTunes 12.10.1 for Windows. Multiple issues in libxml2.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.apple.com/en-us/HT210604 Vendor Advisory
https://support.apple.com/en-us/HT210606 Vendor Advisory
https://support.apple.com/en-us/HT210607 Vendor Advisory
https://support.apple.com/en-us/HT210634 Vendor Advisory
https://support.apple.com/en-us/HT210635 Vendor Advisory
https://support.apple.com/en-us/HT210636 Vendor Advisory
https://support.apple.com/en-us/HT210637 Vendor Advisory
https://support.apple.com/en-us/HT210722 Vendor Advisory
https://support.apple.com/en-us/HT210604 Vendor Advisory
https://support.apple.com/en-us/HT210606 Vendor Advisory
https://support.apple.com/en-us/HT210607 Vendor Advisory
https://support.apple.com/en-us/HT210634 Vendor Advisory
https://support.apple.com/en-us/HT210635 Vendor Advisory
https://support.apple.com/en-us/HT210636 Vendor Advisory
https://support.apple.com/en-us/HT210637 Vendor Advisory
https://support.apple.com/en-us/HT210722 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-8749), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.