---
id: "CVE-2020-9859"
kind: "vulnerability"
aliases: ["CVE-2020-9859"]
title: "Apple Multiple Products: Apple Multiple Products Code Execution Vulnerability"
severity: "high"
cvss: 7.8
epss: 0.00829
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Apple Multiple Products", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["apple", "exploited", "infrastructure", "ios", "ipados", "macos", "tvos", "watchos"]
not_affected_if: ["fully-patched-devices"]
published_at: "2020-06-05T15:15:11+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-9859", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-9859", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-9859", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Apple Multiple Products: Apple Multiple Products Code Execution Vulnerability

Apple iOS, iPadOS, macOS, watchOS and tvOS contain an unspecified flaw that lets an application execute code with kernel privileges. An attacker who can run an app on the device can take full control of the operating system.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Apple Multiple Products affected ? fixed ?

## How to check

Check the installed OS version on each Apple device (macOS: About This Mac; iOS/iPadOS: Settings > General > About) and compare it with the patched release listed in Apple's security notes.

## Fix

Update iOS, iPadOS, macOS, watchOS and tvOS to a release that includes Apple's fix for CVE-2020-9859, as CISA directs.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-9859
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2020-9859
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2020-9859

## From the sources

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5.1 and iPadOS 13.5.1, macOS Catalina 10.15.5 Supplemental Update, tvOS 13.4.6, watchOS 6.2.6. An application may be able to execute arbitrary code with kernel privileges.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_