# CVE-2021-31010: Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability

> CVE-2021-31010: Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-31010
Last updated: 2025-10-21T23:25:36Z

- Published: 2021-08-24 18:51 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: apple
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS: 3.7%, 90th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-08-25, federal due date 2022-09-15, ransomware use: Unknown

## Description

A deserialization issue was addressed through improved validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 12.5.5, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. A sandboxed process may be able to circumvent sandbox restrictions. Apple was aware of a report that this issue may have been actively exploited at the time of release..

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Apple: macOS
- Apple: watchOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-31010)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-31010)
- [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/en-us/HT212824](https://support.apple.com/en-us/HT212824)

---

_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/)_


---
Canonical: https://rewindex.com/cve/CVE-2021-31010 · Markdown: https://rewindex.com/cve/CVE-2021-31010.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-31010 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:06.991Z