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Vulnerability record · CVE-2020-3878 · published 27 February 2020

CVE-2020-3878: Apple icloud out-of-bounds read vulnerability

Apple · Icloud

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5, iTunes 12.10.7 for Windows, iCloud for Windows 11.2, iCloud for Windows 7.19. Processing a maliciously crafted image may lead to arbitrary code execution.

7.8 CVSS 3.1 High EPSS 9.4% · top 4.7% CWE-125 · Out-of-bounds read
7.8CVSS 3.1 base score, v2 6.8
9.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5, iTunes 12.10.7 for Windows, iCloud for Windows 11.2, iCloud for Windows 7.19. Processing a maliciously crafted image may lead to arbitrary code execution.

CVSS:3.1/AV:L/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://support.apple.com/HT211168 Vendor Advisory
https://support.apple.com/HT211170 Vendor Advisory
https://support.apple.com/HT211171 Vendor Advisory
https://support.apple.com/HT211175 Vendor Advisory
https://support.apple.com/HT211178 Vendor Advisory
https://support.apple.com/HT211179 Vendor Advisory
https://support.apple.com/HT211181 Vendor Advisory
https://support.apple.com/HT211168 Vendor Advisory
https://support.apple.com/HT211170 Vendor Advisory
https://support.apple.com/HT211171 Vendor Advisory
https://support.apple.com/HT211175 Vendor Advisory
https://support.apple.com/HT211178 Vendor Advisory
https://support.apple.com/HT211179 Vendor Advisory
https://support.apple.com/HT211181 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-2020-3878), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.