# CVE-2021-30860: Apple Multiple Products Integer Overflow Vulnerability

> CVE-2021-30860: Apple Multiple Products Integer Overflow Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-30860
Last updated: 2025-10-21T23:25:37Z

- Published: 2021-08-24 18:49 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: apple
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 76.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2021-11-17, ransomware use: Unknown

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Apple: iOS
- Apple: macOS
- Apple: watchOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-30860)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-30860)
- [http://seclists.org/fulldisclosure/2021/Sep/25](http://seclists.org/fulldisclosure/2021/Sep/25)
- [http://seclists.org/fulldisclosure/2021/Sep/26](http://seclists.org/fulldisclosure/2021/Sep/26)
- [http://seclists.org/fulldisclosure/2021/Sep/27](http://seclists.org/fulldisclosure/2021/Sep/27)
- [http://seclists.org/fulldisclosure/2021/Sep/28](http://seclists.org/fulldisclosure/2021/Sep/28)
- [http://seclists.org/fulldisclosure/2021/Sep/38](http://seclists.org/fulldisclosure/2021/Sep/38)
- [http://seclists.org/fulldisclosure/2021/Sep/39](http://seclists.org/fulldisclosure/2021/Sep/39)
- [http://seclists.org/fulldisclosure/2021/Sep/40](http://seclists.org/fulldisclosure/2021/Sep/40)
- [http://seclists.org/fulldisclosure/2021/Sep/50](http://seclists.org/fulldisclosure/2021/Sep/50)
- [https://security.gentoo.org/glsa/202209-21](https://security.gentoo.org/glsa/202209-21)
- [https://support.apple.com/en-us/HT212804](https://support.apple.com/en-us/HT212804)
- [https://support.apple.com/en-us/HT212805](https://support.apple.com/en-us/HT212805)
- [https://support.apple.com/en-us/HT212806](https://support.apple.com/en-us/HT212806)
- [https://support.apple.com/en-us/HT212807](https://support.apple.com/en-us/HT212807)
- [https://support.apple.com/kb/HT212824](https://support.apple.com/kb/HT212824)
- [http://www.openwall.com/lists/oss-security/2022/09/02/11](http://www.openwall.com/lists/oss-security/2022/09/02/11)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-30860 · Markdown: https://rewindex.com/cve/CVE-2021-30860.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-30860 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:28.689Z