What is CVE-2020-9898?

CVE-2020-9898 is a critical-severity vulnerability in Apple iOS. CVSS score: 9.8/10. Published 2020-10-22.

How severe is CVE-2020-9898?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Apple iOS

CVE-2020-9898

This issue was addressed with improved entitlements. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A sandboxed process may be able to circumvent sandbox restrictions.

Published 2020-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (70.9th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Apple iOS — versions unspecified
Apple Ipados
Apple Iphone OS
Apple macOS — versions unspecified
Apple Mac OS X

References

support.apple.com/kb/HT211289 (Vendor Advisory)
support.apple.com/kb/HT211288 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-9898?: CVE-2020-9898 is a critical-severity vulnerability in Apple iOS. CVSS score: 9.8/10. Published 2020-10-22.
How severe is CVE-2020-9898?: Critical severity. CVSS v3 base score is 9.8 out of 10.