7.8
High
Exploited
CVE-2021-30900 Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-787, CWE-20
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| iOS and iPadOS 14.8 | earliest → < 14.8 | 14.8 |
References
- support.apple.com support.apple.com
- support.apple.com support.apple.com
- support.apple.com support.apple.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
Other CVEs of iOS and iPadOS
The 2049 CVEs of iOS and iPadOS →
CVE-2026-86925
An authorization issue was addressed with improved state management
5.5
Medium
CVE-2026-84627
A buffer overflow was addressed with improved bounds checking
7.8
High
CVE-2026-86972
A buffer overflow was addressed with improved size validation
7.8
High
CVE-2026-113912
An out-of-bounds access issue was addressed with improved bounds checking
7.1
High