vulnerability

OS X update for Safari (CVE-2021-1861)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
Aug 23, 2021
Added
Aug 23, 2021
Modified
Mar 27, 2026

Description

An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.

Solution

apple-osx-upgrade-11_3
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.