CVE-2020-9859VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2020-9859: Apple Multiple Products Code Execution Vulnerability

Affects Apple Multiple ProductsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 0.8% chance of exploitation in 30 days – higher than 57% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2020-9859 (opens in a new tab)

Description

An unspecified vulnerability in Apple iOS, iPadOS, macOS, watchOS, and tvOS may allow an application to execute code with kernel privileges. This vulnerability is known to have been exploited in the wild. No specific affected versions or patch information is provided.

Summary

CVE-2020-9859 is a vulnerability affecting multiple Apple operating systems including iOS, iPadOS, macOS, watchOS, and tvOS. The flaw allows an application to execute code with kernel-level privileges, potentially leading to full system compromise. The exact technical details of the vulnerability are unspecified. Exploitation has been observed in the wild, indicating active threat use. No explicit patch or remediation details are provided in the available data.

Impact

Successful exploitation allows an application to execute arbitrary code with kernel privileges, which can lead to complete control over the affected device's operating system. This elevates the risk of unauthorized access, data compromise, and persistent system manipulation.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Due to the lack of explicit patch information, users and administrators should monitor official Apple security advisories for updates and apply any available fixes promptly.

Weaknesses

CWE-415Double Free (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:40:42 UTC

Weaknesses

References

Related threats