CVE-2021-1803

Name: CVE-2021-1803
Creator: NVD / NIST
Published: 2021-04-02T19:15:19.99+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2021-1803 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. The issue was addressed with improved permissions logic. This issue is fixed in macOS Big Sur 11.0.1. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

The issue was addressed with improved permissions logic. This issue is fixed in macOS Big Sur 11.0.1. A local application may be able to enumerate the user's iCloud documents.

Metrics

CVSS 3.1

3.3/10

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

EPSS Probability

0.58%

43.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Macos	< 11.0.1

References

https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-1803?

The issue was addressed with improved permissions logic. This issue is fixed in macOS Big Sur 11.0.1. A local application may be able to enumerate the user's iCloud documents.

How severe is CVE-2021-1803?

CVE-2021-1803 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1803?

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-2021-1803?

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

Scan your code now

Source: NVD / NIST