CVE-2021-1840

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A local attacker may be able to elevate their privileges.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
ApplemacOS>= unspecified, < 11.3
ApplemacOS>= unspecified, < 2021
ApplemacOS>= unspecified, < 2021

References

Timeline

Published
Sep 8, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-1840: High severity, CVSS 7.8 | Vulnix