CVE-2020-9999

Name: CVE-2020-9999
Creator: NVD / NIST
Published: 2020-12-08T20:15:18.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 2.89%

Last modified Jun 17, 2026

CVE-2020-9999 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, iTunes for Windows 12.10.9. EPSS estimates a 2.89% chance of exploitation in the next 30 days.

Description

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, iTunes for Windows 12.10.9. Processing a maliciously crafted text file 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

2.89%

85.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 11.5.0
Apple	Itunes	< 12.10.9
Apple	Ipados	< 14.0
Apple	Iphone Os	< 14.0
Apple	Mac Os X	< 11.0.1
Apple	Tvos	< 14.0
Apple	Watchos	< 7.0

References

http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/en-us/HT211952Vendor Advisory
https://support.apple.com/kb/HT211843Vendor Advisory
https://support.apple.com/kb/HT211844Vendor Advisory
https://support.apple.com/kb/HT211850Vendor Advisory
https://support.apple.com/kb/HT211935Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/en-us/HT211952Vendor Advisory
https://support.apple.com/kb/HT211843Vendor Advisory
https://support.apple.com/kb/HT211844Vendor Advisory
https://support.apple.com/kb/HT211850Vendor Advisory
https://support.apple.com/kb/HT211935Vendor Advisory

Timeline

Published: Dec 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9999?

How severe is CVE-2020-9999?

CVE-2020-9999 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.89% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9999?

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-2020-9999?

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

Scan your code now

Source: NVD / NIST