CVE-2021-1782 kev in the critical feed json
A race condition was addressed with improved locking.
published 2021-04-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7246
- cvss
- 7.0
- version 3.1, CNA
- cisa kev
- Exploited
- added 2021-11-03
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..
Patch / fix
cisa required action Apply updates per vendor instructions.
- Apple iOS and iPadOS 14.4
- Apple macOS 7.3, 11.2, 14.4
Timeline
- 0-day patched (Project Zero)
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 5 y ago
- Patch by
- 2021-11-17 (4 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Apple, Multiple Products
- CISA name
- Apple Multiple Products Race Condition 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
- 2021-01-26
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
2.22% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.9 | AV:L/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-667 Improper Locking
References
-
support.apple.com
/en-us/HT212147
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212146
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212148
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212149
release-notes, vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782
government-resource, us-government-resource
Sources
- CVE List CVE-2021-1782
- NVD CVE-2021-1782
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