Apple OS Logic Issue Arbitrary Code Execution
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
Until patches are applied, users should restrict device exposure to untrusted networks and minimize critical activities on unpatched systems. Deploy enhanced endpoint detection and response (EDR) solutions to monitor for anomalous process execution or outbound connections from Apple devices. Consider temporary network segmentation for vulnerable systems to isolate them from critical infrastructure.
The permanent resolution is to immediately update all affected Apple devices to the patched versions. This includes macOS Big Sur 11.2, Security Update 2021-001 for Catalina and Mojave, and iOS/iPadOS 14.4. Prompt patching is critical due to active exploitation of this vulnerability.
A remote attacker can achieve arbitrary code execution on affected Apple devices. This enables full system compromise, allowing data exfiltration, installation of malware, or further network exploitation. Given active exploitation, this poses a critical risk for severe data breaches and operational disruption.
No CWE classification has been assigned.
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