A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. 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..
Published 2021-09-08 15:15:14
Updated 2022-07-12 17:42:04
Source Apple Inc.
View at NVD,   CVE.org
Vulnerability category: Overflow

CVE-2021-30666 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Apple iOS Buffer Overflow Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Apple iOS WebKit contains a buffer-overflow vulnerability which may allow for code execution when processing maliciously crafted web content.
Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-30666

Probability of exploitation activity in the next 30 days: 0.42%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 74 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-30666

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
NIST
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2021-30666

References for CVE-2021-30666

Products affected by CVE-2021-30666

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