CVE-2021-1789VulnerabilityPublished 05/04/2022Updated 10/24/2026

CVE-2021-1789: Apple Multiple Products Type Confusion Vulnerability

Affects Apple Multiple ProductsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 05/04/2022
KEV deadline: 05/25/2022
EPSS: 14.0% chance of exploitation in 30 days – higher than 96% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-1789 (opens in a new tab)

Description

CVE-2021-1789 is a type confusion vulnerability affecting multiple Apple products. It involves processing maliciously crafted web content that can lead to arbitrary code execution. The vulnerability has been exploited in the wild. No specific affected versions or patch information is provided.

Summary

This vulnerability is a type confusion flaw (CWE-843) in multiple Apple products that allows an attacker to execute arbitrary code by processing specially crafted web content. The issue has been observed in active exploitation scenarios. Details on affected versions and patches are not specified in the provided data.

Impact

Successful exploitation can result in arbitrary code execution on affected Apple products, potentially allowing attackers to take control of the system. The vulnerability has been exploited in the wild, indicating active threat usage.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No specific patches or workarounds are provided in the available information.

Weaknesses

CWE-843Type Confusion (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 11:40:34 UTC

Weaknesses

References

Related threats