CVE-2021-30813

Name: CVE-2021-30813
Creator: NVD / NIST
Published: 2021-10-28T19:15:08.813+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2021-30813 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.0.1. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.0.1. A person with access to a host Mac may be able to bypass the Login Window in Remote Desktop for a locked instance of macOS.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.24%

14.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Macos	< 12.0.1

References

https://support.apple.com/en-us/HT212869Vendor Advisory
https://support.apple.com/en-us/HT212869Vendor Advisory

Timeline

Published: Oct 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30813?

How severe is CVE-2021-30813?

CVE-2021-30813 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30813?

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-2021-30813?

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

Scan your code now

Source: NVD / NIST