CVE-2021-1871
CriticalActively exploited (CISA KEV)
Description
A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
SeverityCritical
CVSS9.8
Exploit probability—
Product
Apple iOS, iPadOS, and macOS
PublishedApr 2, 2021
First seenApr 2, 2021
Added to KEVNov 3, 2021
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: Nov 17, 2021Update
- apple ipados14.4 or later
- apple iphone_os14.4 or later
- apple mac_os_x10.15.7 or later
- apple macos11.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple ipados | v < 14.4 | 14.4 |
| apple iphone_os | v < 14.4 | 14.4 |
| apple mac_os_x | 10.15 ≤ v < 10.15.7, 10.15.7 | 10.15.7 |
| apple macos | 11.0.1 ≤ v < 11.2 | 11.2 |
| debian debian_linux | 10.0 | — |
| fedoraproject fedora | 33 | — |
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