CVE-2021-1870

CRITICAL KEV

Apple Ipados < 14.4 - Denial of Service

Title source: rule

Description

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..

References (6)

[Broken Link, Mailing List] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/

[Broken Link, Mailing List] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/

[Third Party Advisory] https://security.gentoo.org/glsa/202104-03

[Release Notes, Vendor Advisory] https://support.apple.com/en-us/HT212146

[Release Notes, Vendor Advisory] https://support.apple.com/en-us/HT212147

[US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1870

Scores

CVSS v3 9.8

EPSS 0.0115

EPSS Percentile 78.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CISA KEV 2021-11-03

VulnCheck KEV 2021-01-26

InTheWild.io 2021-01-26

ENISA EUVD EUVD-2021-7334

Status published

Products (8)

apple/ipados < 14.4

apple/iphone_os < 14.4

apple/macos 11.0.1 - 11.2

apple/mac_os_x 10.15.7 (3 CPE variants)

apple/mac_os_x 10.15 - 10.15.7

fedoraproject/fedora 32

fedoraproject/fedora 33

webkitgtk/webkitgtk < 2.30.6

Published Apr 02, 2021

KEV Added Nov 03, 2021

Tracked Since Feb 18, 2026