What is CVE-2021-30814?

CVE-2021-30814 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-10-28.

How severe is CVE-2021-30814?

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

Buffer overflow in Apple iOS And Ipados

CVE-2021-30814

A memory corruption issue was addressed with improved input validation. This issue is fixed in tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing a maliciously crafted image may lead to arbitrary code execution.

Vulnerability class: Buffer Overflow

Published 2021-10-28 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.011 (65.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS
Apple macOS
Apple tvOS — versions unspecified
Apple watchOS — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

support.apple.com/en-us/HT212814 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT212819 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT212815 (Release Notes, Vendor Advisory)
support.apple.com/kb/HT212869 (Vendor Advisory)
support.apple.com/kb/HT212953 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-30814?: CVE-2021-30814 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-10-28.
How severe is CVE-2021-30814?: High severity. CVSS v3 base score is 7.8 out of 10.