CVE-2021-30767

Name: CVE-2021-30767
Creator: NVD / NIST
Published: 2021-12-23T20:15:09.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2021-30767 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.6.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.6.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A local user may be able to modify protected parts of the file system.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.27%

19.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 15.2
Apple	Iphone Os	< 15.2
Apple	Mac Os X	>= 10.15, < 10.15.7
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.6.2
Apple	Macos	>= 12.0, < 12.1
Apple	Watchos	<= 8.3

References

https://support.apple.com/en-us/HT212975Vendor Advisory
https://support.apple.com/en-us/HT212976Vendor Advisory
https://support.apple.com/en-us/HT212978Vendor Advisory
https://support.apple.com/en-us/HT212979Vendor Advisory
https://support.apple.com/en-us/HT212981Vendor Advisory
https://support.apple.com/en-us/HT212975Vendor Advisory
https://support.apple.com/en-us/HT212976Vendor Advisory
https://support.apple.com/en-us/HT212978Vendor Advisory
https://support.apple.com/en-us/HT212979Vendor Advisory
https://support.apple.com/en-us/HT212981Vendor Advisory

Timeline

Published: Dec 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30767?

How severe is CVE-2021-30767?

CVE-2021-30767 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30767?

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-2021-30767?

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

Scan your code now

Source: NVD / NIST