AEGLIX vulnerability intelligence
CVE-2021-1871
CRITICAL · CVSS 9.8 · Analyzed
Published: 2021-04-02 · Updated: 2026-06-17 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T13:15:20.980423+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
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..
Patch review priority
Known exploitation: prioritize review
- CISA KEV lists real-world exploitation.
FIRST EPSS: 7.00% · percentile 94.1 · 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
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- NVD-CWE-noinfo
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 · iOS, iPadOS, and macOS
- 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:o:apple:ipados:*:*:*:*:*:*:*:*
Before (exclusive): 14.4
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Before (exclusive): 14.4
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
From (inclusive): 10.15
Before (exclusive): 10.15.7
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
From (inclusive): 11.0.1
Before (exclusive): 11.2
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
Broken Link · Mailing List
- https://support.apple.com/en-us/HT212146
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212147
Release Notes · Vendor Advisory
- https://www.debian.org/security/2021/dsa-4923
Mailing List · Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
Broken Link · Mailing List
- https://support.apple.com/en-us/HT212146
Release Notes · Vendor Advisory
- https://support.apple.com/en-us/HT212147
Release Notes · Vendor Advisory
- https://www.debian.org/security/2021/dsa-4923
Mailing List · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1871
US Government Resource