CVE-2021-31010 kev in the critical feed json
A deserialization issue was addressed through improved validation.
published 2021-08-24 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17927
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-08-25
- epss
- 3.7%
- EPSS 3.7% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
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..
Patch / fix
cisa required action Apply updates per vendor instructions.
- Apple macOS 11.6, 2021
- Apple watchOS 7.6, 12.5, 14.8
Timeline
- Published
- 0-day patched (Project Zero)
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-09-15 (4 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Apple, iOS, macOS, watchOS
- CISA name
- Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Patched
- 2021-09-13
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
3.67% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- Apple macOS
- Apple watchOS
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
support.apple.com
/en-us/HT212804
vendor-advisory
-
support.apple.com
/en-us/HT212805
vendor-advisory
-
support.apple.com
/en-us/HT212807
vendor-advisory
-
support.apple.com
/en-us/HT212806
vendor-advisory
-
support.apple.com
/en-us/HT212824
vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31010
government-resource, us-government-resource
Sources
- CVE List CVE-2021-31010
- NVD CVE-2021-31010
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.