CVE-2021-1861

4.3 mediumEPSS 0.9%

Medium (4.3) in apple macos. EPSS 0.9% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-11-01)
Published: 2021-09-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apple:macos

References

https://support.apple.com/en-us/HT212325
https://support.apple.com/en-us/HT212325

Check your stack JSON