What is CVE-2021-1831?

CVE-2021-1831 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2021-09-08.

How severe is CVE-2021-1831?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-1831 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apple iOS And Ipados

CVE-2021-1831

The issue was addressed with improved permissions logic. This issue is fixed in iOS 14.5 and iPadOS 14.5. An application may allow shortcuts to access restricted files.

Published 2021-09-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

n0-traces/cve_

References

support.apple.com/en-us/HT212317 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1831?: CVE-2021-1831 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2021-09-08.
How severe is CVE-2021-1831?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-1831 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.