AEGLIX vulnerability intelligence
CVE-2021-30661
HIGH · CVSS 8.8 · Analyzed
Published: 2021-09-08 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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..
Severity and scoring
- CVSS score
- 8.8 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Apple · Multiple Products
- Added to catalog
- 2021-11-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2021-11-17
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
Before (exclusive): 14.1
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
Before (exclusive): 14.5
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Before (exclusive): 12.5.3
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
From (inclusive): 14.0
Before (exclusive): 14.5
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
From (inclusive): 11.0
Before (exclusive): 11.3
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
Before (exclusive): 14.5
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
Before (exclusive): 7.4
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://support.apple.com/en-us/HT212317
Vendor Advisory
- https://support.apple.com/en-us/HT212318
Vendor Advisory
- https://support.apple.com/en-us/HT212323
Vendor Advisory
- https://support.apple.com/en-us/HT212324
Vendor Advisory
- https://support.apple.com/en-us/HT212325
Vendor Advisory
- https://support.apple.com/en-us/HT212341
Vendor Advisory
- https://support.apple.com/en-us/HT212317
Vendor Advisory
- https://support.apple.com/en-us/HT212318
Vendor Advisory
- https://support.apple.com/en-us/HT212323
Vendor Advisory
- https://support.apple.com/en-us/HT212324
Vendor Advisory
- https://support.apple.com/en-us/HT212325
Vendor Advisory
- https://support.apple.com/en-us/HT212341
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661
Third Party Advisory · US Government Resource