CVE-2021-30799

8.8 highEPSS 2.3%

High (8.8) in apple. EPSS 2.3% chance of exploitation in the next 30 days.

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. Processing maliciously crafted web content may lead to arbitrary code execution.

Severity

CVSS 3.1

8.8 high

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

EPSS: 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2021-09-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apple:iphone_os
apple:mac_os_x
apple:macos

References

https://support.apple.com/en-us/HT212600
https://support.apple.com/en-us/HT212601
https://support.apple.com/en-us/HT212602
https://support.apple.com/en-us/HT212603
https://support.apple.com/en-us/HT212600

Check your stack JSON