CVE-2021-30762highunder attackCWE-416

CVE-2021-30762: high-severity vulnerability in Apple iOS

Published · Updated

Follow this CVE+ Monitor iOS+ Monitor webkit2gtk

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

56Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 8.8epss 11%
from disclosure to weapon
Published on NVDSep 8
CISA KEV+56d
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗
Affected
2 products (9 components)
Red Hat Enterprise Linux 7 · Red Hat Enterprise Linux 6
no_fix_planned: Will not fix
Fixed
11 products (366 components)
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat Enterprise Linux Client (v. 7) · Red Hat Enterprise Linux Client Optional (v. 7) · Red Hat Enterprise Linux ComputeNode (v. 7) · Red Hat Enterprise Linux ComputeNode Optional (v. 7) · and others 6
fix ↗
Not affected
4 products (1,153 components) — because the vulnerable code is not present in the product
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat CodeReady Linux Builder (v. 8) · Red Hat Enterprise Linux BaseOS (v. 8) · Red Hat Enterprise Linux 9
Action required by CISAfederal deadline: 2021-11-17

Apply updates per vendor instructions.

In short

A memory management flaw in iOS allows attackers to execute arbitrary code by processing malicious web content. This vulnerability was actively exploited in the wild.

Technical detail

Use-after-free vulnerability in iOS 12.5.4 web content processing allows remote code execution via crafted web content without user interaction beyond viewing. The vulnerability stems from improper memory management after object deallocation, enabling arbitrary code execution in the context of the vulnerable process.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.5.4. 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..
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Apple · iOS
Related CVEs — Apple iOS

In the same product, most dangerous first.

CVE-2021-30860HIGHCVE-2021-30860EPSS 76.0%KEVCVE-2019-8605HIGHCVE-2019-8605EPSS 17.6%KEVCVE-2019-8506HIGHCVE-2019-8506EPSS 16.2%KEVCVE-2019-7286HIGHCVE-2019-7286EPSS 15.9%KEVCVE-2020-3837HIGHCVE-2020-3837EPSS 14.8%KEVCVE-2021-30858HIGHCVE-2021-30858EPSS 13.4%KEV