CVE-2020-36521

Name: CVE-2020-36521
Creator: NVD / NIST
Published: 2022-09-23T19:15:10.383+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2020-36521 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. An out-of-bounds read was addressed with improved input validation. This issue is fixed in iCloud for Windows 11.4, iOS 14.0 and iPadOS 14.0, watchOS 7.0, tvOS 14.0, iCloud for Windows 7.21, iTunes for Windows 12.10.9. EPSS estimates a 0.40% 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 iCloud for Windows 11.4, iOS 14.0 and iPadOS 14.0, watchOS 7.0, tvOS 14.0, iCloud for Windows 7.21, iTunes for Windows 12.10.9. Processing a maliciously crafted tiff file may lead to a denial-of-service or potentially disclose memory contents.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

0.40%

31.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.21
Apple	Icloud	>= 11.0, < 11.4
Apple	Itunes	< 12.10.9
Apple	Ipados	< 14.0
Apple	Iphone Os	< 14.0
Apple	Macos	< 10.15.7
Apple	Tvos	< 14.0
Apple	Watchos	< 7.0

References

https://support.apple.com/en-us/HT211843Vendor Advisory
https://support.apple.com/en-us/HT211844Vendor Advisory
https://support.apple.com/en-us/HT211846Vendor Advisory
https://support.apple.com/en-us/HT211847Vendor Advisory
https://support.apple.com/en-us/HT211850Vendor Advisory
https://support.apple.com/en-us/HT211952Vendor Advisory
https://support.apple.com/en-us/HT211843Vendor Advisory
https://support.apple.com/en-us/HT211844Vendor Advisory
https://support.apple.com/en-us/HT211846Vendor Advisory
https://support.apple.com/en-us/HT211847Vendor Advisory
https://support.apple.com/en-us/HT211850Vendor Advisory
https://support.apple.com/en-us/HT211952Vendor Advisory

Timeline

Published: Sep 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-36521?

How severe is CVE-2020-36521?

CVE-2020-36521 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36521?

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-2020-36521?

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

Scan your code now

Source: NVD / NIST