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CVE-2021-30661

HIGHCISA KEV

8.8

Description

A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. 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

ProductMultiple Products

Vulnerability NameApple Multiple Products WebKit Storage Use-After-Free Vulnerability

KEV Date Added2021-11-03

Remediation Due Date2021-11-17

Ransomware UseUnknown

Affected Products

apple:ipadosapple:iphone_osapple:macosapple:safariapple:tvosapple:watchos

Weaknesses (CWE)

CWE-416CWE-416

References

https://support.apple.com/en-us/HT212317(product-security@apple.com)

https://support.apple.com/en-us/HT212318(product-security@apple.com)

https://support.apple.com/en-us/HT212323(product-security@apple.com)

https://support.apple.com/en-us/HT212324(product-security@apple.com)

https://support.apple.com/en-us/HT212325(product-security@apple.com)

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

https://support.apple.com/en-us/HT212317(af854a3a-2127-422b-91ae-364da2661108)

https://support.apple.com/en-us/HT212318(af854a3a-2127-422b-91ae-364da2661108)

https://support.apple.com/en-us/HT212323(af854a3a-2127-422b-91ae-364da2661108)

https://support.apple.com/en-us/HT212324(af854a3a-2127-422b-91ae-364da2661108)

https://support.apple.com/en-us/HT212325(af854a3a-2127-422b-91ae-364da2661108)

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

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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