What is CVE-2021-30906?

CVE-2021-30906 is a high-severity vulnerability in Apple iOS And Ipados. CVSS score: 7.8/10. Published 2021-08-24.

How severe is CVE-2021-30906?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Apple iOS And Ipados

CVE-2021-30906

This issue was addressed with improved checks. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. A local attacker may be able to elevate their privileges.

Published 2021-08-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (21.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS
Apple macOS — versions unspecified, 12.0
Apple Mac OS X — versions 10.15.7
Apple tvOS
Apple watchOS

References

Frequently asked questions

What is CVE-2021-30906?: CVE-2021-30906 is a high-severity vulnerability in Apple iOS And Ipados. CVSS score: 7.8/10. Published 2021-08-24.
How severe is CVE-2021-30906?: High severity. CVSS v3 base score is 7.8 out of 10.