CVE-2021-1817

HIGH

macOS 11.0-11.2 - Out-of-bounds Write via Malicious Web Content

Title source: llm
STIX 2.1

Description

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. Processing maliciously crafted web content may lead to arbitrary code execution.

References (4)

Core 4
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212317
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212323
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212324
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212325

Scores

CVSS v3 8.8
EPSS 0.0184
EPSS Percentile 76.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (5)
apple/ipados < 14.5
apple/iphone_os < 14.5
apple/macos 11.0 - 11.3
apple/tvos < 14.5
apple/watchos < 7.4
Published Sep 08, 2021
Tracked Since Feb 18, 2026