AEGLIX vulnerability intelligence
CVE-2021-30858
HIGH · CVSS 8.8 · Analyzed
Published: 2021-08-24 · Updated: 2026-06-17 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T11:37:54.020468+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. 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.
Patch review priority
Known exploitation: prioritize review
- CISA KEV lists real-world exploitation.
FIRST EPSS: 13.38% · percentile 96.4 · 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-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 · 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:*:*:*:*:*:*:*:*
From (inclusive): 13.1
Before (exclusive): 14.8
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Before (exclusive): 12.5.5
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
From (inclusive): 13.0
Before (exclusive): 14.8
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Before (exclusive): 11.6
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://seclists.org/fulldisclosure/2021/Sep/25
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/27
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/29
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/38
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/39
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/50
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/20/1
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/26/9
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/1
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/2
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/4
Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
Release Notes
- https://support.apple.com/en-us/HT212804
Third Party Advisory
- https://support.apple.com/en-us/HT212807
Third Party Advisory
- https://support.apple.com/kb/HT212824
Third Party Advisory
- https://www.debian.org/security/2021/dsa-4975
Mailing List · Third Party Advisory
- https://www.debian.org/security/2021/dsa-4976
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/25
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/27
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/29
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/38
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/39
Mailing List · Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Sep/50
Mailing List · Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/20/1
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/26/9
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/1
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/2
Mailing List
- http://www.openwall.com/lists/oss-security/2021/10/27/4
Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
Release Notes
- https://support.apple.com/en-us/HT212804
Third Party Advisory
- https://support.apple.com/en-us/HT212807
Third Party Advisory
- https://support.apple.com/kb/HT212824
Third Party Advisory
- https://www.debian.org/security/2021/dsa-4975
Mailing List · Third Party Advisory
- https://www.debian.org/security/2021/dsa-4976
Mailing List · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858
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