What is CVE-2021-30698?

CVE-2021-30698 is a high-severity vulnerability in Apple iOS And Ipados, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-09-08.

How severe is CVE-2021-30698?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-30698 known to be exploited?

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

NULL pointer dereference in Apple iOS And Ipados

CVE-2021-30698

A null pointer dereference was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, Safari 14.1.1, iOS 14.6 and iPadOS 14.6. A remote attacker may be able to cause a denial of service.

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.022 (81.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

n0-traces/cve_

References

support.apple.com/en-us/HT212528 (Vendor Advisory)
support.apple.com/en-us/HT212529 (Vendor Advisory)
support.apple.com/en-us/HT212534 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-30698?: CVE-2021-30698 is a high-severity vulnerability in Apple iOS And Ipados, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-09-08.
How severe is CVE-2021-30698?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-30698 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.