CVE-2021-1821

MEDIUM

macOS < 11.5 - Denial of Service via Malicious Webpage

Title source: llm

Description

A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.

References (2)

Core 2

Core References

Vendor Advisory x_refsource_misc

https://support.apple.com/en-us/HT212602

Vendor Advisory x_refsource_misc

https://support.apple.com/en-us/HT212605

Scores

CVSS v3 6.5

EPSS 0.0064

EPSS Percentile 46.5%

Attack Vector NETWORK

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

Details

Status published

Products (2)

apple/macos < 11.5

apple/watchos < 7.6

Published Oct 28, 2021

Tracked Since Feb 18, 2026