CVE-2020-3878

Name: CVE-2020-3878
Creator: NVD / NIST
Published: 2020-02-27T21:15:18.85+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 9.22%

Last modified Jun 17, 2026

CVE-2020-3878 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 9.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

9.22%

94.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.19
Apple	Icloud	>= 11.0, < 11.2
Apple	Itunes	< 12.10.7
Apple	Ipados	< 13.5
Apple	Iphone Os	< 13.5
Apple	Mac Os X	>= 10.13, < 10.13.6
Apple	Mac Os X	>= 10.14, < 10.14.6
Apple	Mac Os X	>= 10.15, < 10.15.5
Apple	Mac Os X	10.13.6
Apple	Mac Os X	10.14.6
Apple	Tvos	< 13.4.5
Apple	Watchos	< 6.2.5

References

https://support.apple.com/HT211168Vendor Advisory
https://support.apple.com/HT211170Vendor Advisory
https://support.apple.com/HT211171Vendor Advisory
https://support.apple.com/HT211175Vendor Advisory
https://support.apple.com/HT211178Vendor Advisory
https://support.apple.com/HT211179Vendor Advisory
https://support.apple.com/HT211181Vendor Advisory
https://support.apple.com/HT211168Vendor Advisory
https://support.apple.com/HT211170Vendor Advisory
https://support.apple.com/HT211171Vendor Advisory
https://support.apple.com/HT211175Vendor Advisory
https://support.apple.com/HT211178Vendor Advisory
https://support.apple.com/HT211179Vendor Advisory
https://support.apple.com/HT211181Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-3878?

How severe is CVE-2020-3878?

CVE-2020-3878 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 9.22% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3878?

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-2020-3878?

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

Scan your code now

Source: NVD / NIST