---
id: "CVE-2021-30860"
kind: "vulnerability"
aliases: ["CVE-2021-30860"]
title: "Apple Multiple Products: Apple Multiple Products Integer Overflow Vulnerability"
severity: "critical"
cvss: 7.8
epss: 0.75994
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Apple Multiple Products", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["apple-devices", "exploited", "ios", "ipados", "macos", "vendor", "watchos"]
not_affected_if: ["fully-patched-devices"]
published_at: "2021-08-24T19:15:14+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-2021-30860", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-30860", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-30860", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Apple Multiple Products: Apple Multiple Products Integer Overflow Vulnerability

Apple CoreGraphics on iOS, iPadOS, macOS and watchOS has an integer overflow when rendering a crafted PDF. An attacker who sends a malicious PDF can run code on the device, known in the wild as FORCEDENTRY.

_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 device OS version under Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare it to the patched release in Apple's security notes.

## Fix

Update iOS, iPadOS, macOS and watchOS to a release that includes the Apple fix for CVE-2021-30860, per Apple's vendor instructions.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30860
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2021-30860
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-30860

## From the sources

An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

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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_