CVEvulnerability

CVE-2021-30762

8.8 HIGH Known exploited Published 2021-09-08 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Apple iOS WebKit Use-After-Free Vulnerability — Apple iOS

Apple iOS WebKit contains a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Added to KEV: 2021-11-03
Remediation due: 2021-11-17
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-30762

Status: Analyzed
Published: 2021-09-08
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses: CWE-416

Description

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..

Affected configurations

• apple iphone os (< 12.5.4)

Weakness · CWE (1)

CWE-416 Use After Free weakness

References