AEGLIX vulnerability intelligence
CVE-2021-30663
HIGH · CVSS 8.8 · Analyzed
Published: 2021-09-08 · Updated: 2026-06-17 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T11:37:37.015777+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
An integer overflow was addressed with improved input validation. This issue is fixed in iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, Safari 14.1.1, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution.
Patch review priority
Known exploitation: prioritize review
- CISA KEV lists real-world exploitation.
FIRST EPSS: 3.52% · percentile 89.2 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
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-190
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): 14.1.1
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
From (inclusive): 14.0
Before (exclusive): 14.5.1
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): 14.5.1
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
From (inclusive): 11.0
Before (exclusive): 11.3.1
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
Before (exclusive): 14.6
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/HT212335
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212336
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212341
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212532
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212534
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212335
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212336
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212341
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212532
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212534
Release Notes · Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663
Third Party Advisory · US Government Resource