CVE-2021-1873

Name: CVE-2021-1873
Creator: NVD / NIST
Published: 2021-09-08T15:15:12.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2021-1873 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An API issue in Accessibility TCC permissions was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

An API issue in Accessibility TCC permissions was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A malicious application may be able to unexpectedly leak a user's credentials from secure text fields.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.21%

64.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	>= 10.14, <= 10.14.5
Apple	Mac Os X	>= 10.15, <= 10.15.5
Apple	Mac Os X	10.14.6
Apple	Mac Os X	10.15.6
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.3

References

https://support.apple.com/en-us/HT212325Vendor Advisory
https://support.apple.com/en-us/HT212326Vendor Advisory
https://support.apple.com/en-us/HT212327Vendor Advisory
https://support.apple.com/en-us/HT212325Vendor Advisory
https://support.apple.com/en-us/HT212326Vendor Advisory
https://support.apple.com/en-us/HT212327Vendor Advisory

Timeline

Published: Sep 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-1873?

How severe is CVE-2021-1873?

CVE-2021-1873 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1873?

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-2021-1873?

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

Scan your code now

Source: NVD / NIST