CVE-2021-1871

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

A logic issue addressed with improved restrictions affects multiple Apple operating systems, including versions of macOS prior to Big Sur 11.2, Catalina and Mojave prior to Security Update 2021-001, and iOS and iPadOS prior to 14.4. The flaw received a CVSS score of 9.8, reflecting network-accessible attack conditions with no required authentication or user interaction.

A remote attacker can exploit the vulnerability to achieve arbitrary code execution on an affected device. The attack requires only network connectivity and can fully compromise confidentiality, integrity, and availability of the target system.

Apple security updates for the listed platforms remediate the issue, and the vendor has stated awareness of reports indicating active exploitation in the wild. Additional distribution-specific advisories reference the same underlying component updates.