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Vulnerability record · CVE-2019-8820 · published 18 December 2019

CVE-2019-8820: Apple icloud out-of-bounds write vulnerability

Apple · Icloud

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 13.2 and iPadOS 13.2, tvOS 13.2, watchOS 6.1, Safari 13.0.3, iTunes for Windows 12.10.2, iCloud for Windows 11.0, iCloud for Windows 7.15. Processing maliciously crafted web content may lead to arbitrary code execution.

8.8 CVSS 3.1 High EPSS 9.5% · top 4.7% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 6.8
9.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 13.2 and iPadOS 13.2, tvOS 13.2, watchOS 6.1, Safari 13.0.3, iTunes for Windows 12.10.2, iCloud for Windows 11.0, iCloud for Windows 7.15. Processing maliciously crafted web content may lead to arbitrary code execution.

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

Affected products

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

References

LinkTags
https://security.gentoo.org/glsa/202003-22 Third Party Advisory
https://support.apple.com/HT210721 Vendor Advisory
https://support.apple.com/HT210723 Vendor Advisory
https://support.apple.com/HT210724 Vendor Advisory
https://support.apple.com/HT210725 Vendor Advisory
https://support.apple.com/HT210726 Vendor Advisory
https://support.apple.com/HT210727 Vendor Advisory
https://support.apple.com/HT210728 Vendor Advisory
https://security.gentoo.org/glsa/202003-22 Third Party Advisory
https://support.apple.com/HT210721 Vendor Advisory
https://support.apple.com/HT210723 Vendor Advisory
https://support.apple.com/HT210724 Vendor Advisory
https://support.apple.com/HT210725 Vendor Advisory
https://support.apple.com/HT210726 Vendor Advisory
https://support.apple.com/HT210727 Vendor Advisory
https://support.apple.com/HT210728 Vendor Advisory

Track CVE-2019-8820 inside VULONE

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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-2019-8820), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.