CVE-2021-1806

Name: CVE-2021-1806
Creator: NVD / NIST
Published: 2021-04-02T19:15:20.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-1806 is a high-severity vulnerability rated 7/10 on the CVSS scale. A race condition was addressed with additional validation. This issue is fixed in macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, macOS Mojave 10.14.6 Security Update 2021-002. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

A race condition was addressed with additional validation. This issue is fixed in macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, macOS Mojave 10.14.6 Security Update 2021-002. An application may be able to execute arbitrary code with kernel privileges.

Metrics

CVSS 3.1

7/10

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

EPSS Probability

0.90%

55.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	>= 10.14, < 10.14.6
Apple	Mac Os X	>= 10.15, < 10.15.7
Apple	Mac Os X	10.14.6
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.2.1

References

http://seclists.org/fulldisclosure/2021/Apr/54Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT212177Vendor Advisory
https://support.apple.com/kb/HT212327Vendor Advisory
http://seclists.org/fulldisclosure/2021/Apr/54Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT212177Vendor Advisory
https://support.apple.com/kb/HT212327Vendor Advisory

Timeline

Published: Apr 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-1806?

How severe is CVE-2021-1806?

CVE-2021-1806 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1806?

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-2021-1806?

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

Scan your code now

Source: NVD / NIST