CVE-2021-30666

HIGHCISA KEV

8.8

Description

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..

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published9/8/2021

Last Modified10/23/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorApple

ProductiOS

Vulnerability NameApple iOS WebKit Buffer Overflow Vulnerability

KEV Date Added2021-11-03

Remediation Due Date2021-11-17

Ransomware UseUnknown

Affected Products

apple:iphone_os

Weaknesses (CWE)

CWE-119CWE-119

References

https://support.apple.com/en-us/HT212341(product-security@apple.com)

https://support.apple.com/en-us/HT212341(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30666(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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