CVE-2021-1861

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CVSS 3.1

4.3 medium

EPSS

<1%p57

Published

Sep 8, 2021 (Sep 8, 2021)

Modified

Jun 17, 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.

Vendors: apple
Products: macos
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.9%)

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