CVE-2021-31010 (GCVE-0-2021-31010)
Vulnerability from cvelistv5 – Published: 2021-08-24 18:51 – Updated: 2025-10-21 23:25Summary
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..
Severity
7.5 (High)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-29 17:28 UTC
CWE
- 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.
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://support.apple.com/en-us/HT212804 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212805 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212807 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212806 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212824 | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apple | macOS |
Affected:
unspecified , < 11.6
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 2021
(custom)
|
guessed | |
| Apple | watchOS |
Affected:
unspecified , < 7.6
(custom)
|
guessed | |
| Apple | watchOS |
Affected:
unspecified , < 14.8
(custom)
|
guessed | |
| Apple | watchOS |
Affected:
unspecified , < 12.5
(custom)
|
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3b6c9191-bff4-481d-be7c-cfe23a058b33
Exploited: Yes
Timestamps
First Seen: 2022-08-25
Asserted: 2022-08-25
Scope
Notes: KEV entry: Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability | Affected: Apple / iOS, macOS, watchOS | Description: In affected versions of Apple iOS, macOS, and watchOS, a sandboxed process may be able to circumvent sandbox restrictions. | Required action: Apply updates per vendor instructions. | Due date: 2022-09-15 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.apple.com/en-us/HT212804, https://support.apple.com/en-us/HT212805, https://support.apple.com/en-us/HT212806, https://support.apple.com/en-us/HT212807, https://support.apple.com/en-us/HT212824; https://nvd.nist.gov/vuln/detail/CVE-2021-31010
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-20 CWE-502 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | iOS, macOS, watchOS |
| Due Date | 2022-09-15 |
| Date Added | 2022-08-25 |
| Vendorproject | Apple |
| Vulnerabilityname | Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 13:25 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 67e07e20-99b8-4cec-9da3-72adda520d27
Exploited: Yes
Timestamps
First Seen: 2022-08-25
Asserted: 2022-08-25
Scope
Notes: KEVIntel entry: 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... | Affected: Apple / macOS, watchOS | CVSS: 7.5 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | 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... |
| Vendor | Apple |
| Product | macOS, watchOS |
| Added Date | 2022-08-25T00:00:00.000Z |
| Cvss Score | 7.5 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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