CVE-2021-30734

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. Processing maliciously crafted web content may lead to arbitrary code execution.

Affected

Apple · iOS and iPadOS · macOS

CVSS v3.1 NVD

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

2.02% chance of exploitation in the next 30 days, 81st percentile

Published

2021-09-08

Updated

2024-08-03

Proof-of-concept exploits (1)

• ret2/Pwn2Own-2021-Safari143★ · 2022-08-17

Security advisories

• https://support.apple.com/en-us/HT212528
• https://support.apple.com/en-us/HT212529
• https://support.apple.com/en-us/HT212532
• https://support.apple.com/en-us/HT212533
• https://support.apple.com/en-us/HT212534

References

• CVE Record
• NVD entry

Related

• CVE-2021-30735
• CVE-2024-10442
• CVE-2025-1050