CVE-2020-3846

Name: CVE-2020-3846
Creator: NVD / NIST
Published: 2020-02-27T21:15:17.257+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.78%

Last modified Jun 17, 2026

CVE-2020-3846 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A buffer overflow was addressed with improved size validation. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2, iTunes for Windows 12.10.4, iCloud for Windows 11.0, iCloud for Windows 7.17. EPSS estimates a 1.78% chance of exploitation in the next 30 days.

Description

A buffer overflow was addressed with improved size validation. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2, iTunes for Windows 12.10.4, iCloud for Windows 11.0, iCloud for Windows 7.17. Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.78%

75.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.17
Apple	Icloud	>= 10.0, < 10.8
Apple	Itunes	< 12.10.4
Apple	Ipados	< 13.3.1
Apple	Iphone Os	< 13.3.1
Apple	Mac Os X	< 10.15.3
Apple	Tvos	< 13.3.1
Apple	Watchos	< 6.1.2

References

https://support.apple.com/HT210947Release Notes, Vendor Advisory
https://support.apple.com/HT210948Release Notes, Vendor Advisory
https://support.apple.com/HT210947Release Notes, Vendor Advisory
https://support.apple.com/HT210948Release Notes, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-3846?

How severe is CVE-2020-3846?

CVE-2020-3846 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.78% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3846?

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-2020-3846?

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

Scan your code now

Source: NVD / NIST