Is CVE-2021-31010 being actively exploited?

Yes. CVE-2021-31010 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on August 25, 2022.

What is the CVSS score for CVE-2021-31010?

CVE-2021-31010 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2021-31010

HIGH · CVSS 7.5CISA KEV: actively exploitedEPSS 3.7%EU EUVD: exploited

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..

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-502
EPSS score: 3.7% (90th percentile)
In CISA KEV: Yes, added August 25, 2022
In EU EUVD: Yes (EUVD-2021-17927)
Published: August 24, 2021
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability

Added to the KEV catalog on August 25, 2022; federal remediation due September 15, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-17927 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / macos
apple / watchos

Certified products that may be affected

5 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Strong customer authentication pour Apple Pay sur Apple Watch série 4 exécutant watchOS 7.4.1 (Version 18T201) - Apple Inc. - Common Criteria ANSSI-CC-2023/13 - active
Strong Customer Authentication pour Apple Pay, sur MacBook Air 2020 avec M1 exécutant macOS Big Sur 11.3.1 - Apple Inc. - Common Criteria ANSSI-CC-2022/44 - active
Strong Customer Authentication pour Apple Pay sur iPhone SE (de seconde génération) exécutant iOS 14.5.1 Version 18E212 - Apple Inc. - Common Criteria ANSSI-CC-2022/05 - active
Strong Customer Authentication pour Apple Pay sur iPhone (SoC A12 Bionic) exécutant iOS 14.5.1 Version 18E212 - Apple Inc. - Common Criteria ANSSI-CC-2022/04 - active
Apple macOS 11 Big Sur: Contacts - Apple Inc. - Common Criteria CCEVS-VR-VID-11243-2022 - archived

References

https://support.apple.com/en-us/HT212804(Vendor Advisory)
https://support.apple.com/en-us/HT212805(Vendor Advisory)
https://support.apple.com/en-us/HT212806(Vendor Advisory)
https://support.apple.com/en-us/HT212807(Vendor Advisory)
https://support.apple.com/en-us/HT212824(Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31010(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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