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CVE-2021-30661Apple Multiple Products WebKit Storage Use-After-Free Vulnerability
A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
8.8 HIGHEPSS 4.49%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.8 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 6.8 | MEDIUM | 2.0NVD | AV:N/AC:M/Au:N/C:P/I:P/A:P |
CISA required action
⚡ Known exploited · remediation due Nov 17, 2021
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2021-30661
- Status
- Analyzed
- Assigner (CNA)
- apple
- Published
- Sep 8, 2021
- Last modified
- 2026-06-17 03:50 UTC
- Weaknesses
Affected Products
As published by the CNA in the CVE record.
AppleiOS and iPadOS1 version range
- before 14.5
AppleSafari1 version range
- before 14.1
AppletvOS1 version range
- before 14.5
ApplewatchOS1 version range
- before 7.4
ApplemacOS1 version range
- before 11.3
ApplemacOS1 version range
- before 12.5
References
- support.apple.com https://support.apple.com/en-us/HT212317
- support.apple.com https://support.apple.com/en-us/HT212318
- support.apple.com https://support.apple.com/en-us/HT212323
- support.apple.com https://support.apple.com/en-us/HT212324
- support.apple.com https://support.apple.com/en-us/HT212325
- support.apple.com https://support.apple.com/en-us/HT212341
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661