CVE-2021-30849

Name: CVE-2021-30849
Creator: NVD / NIST
Published: 2021-10-19T14:15:09.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.79%

Last modified Jun 17, 2026

CVE-2021-30849 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, watchOS 8, Safari 15, tvOS 15, iOS 15 and iPadOS 15, iTunes 12.12 for Windows. EPSS estimates a 1.79% chance of exploitation in the next 30 days.

Description

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, watchOS 8, Safari 15, tvOS 15, iOS 15 and iPadOS 15, iTunes 12.12 for Windows. Processing maliciously crafted web content may lead to arbitrary code execution.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

1.79%

75.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Apple	Itunes	< 12.12
Apple	Safari	< 15.0
Apple	Ipados	< 14.8
Apple	Iphone Os	< 14.8
Apple	Macos	< 12.0.1
Apple	Tvos	< 15.0
Apple	Watchos	< 8.0

References

http://seclists.org/fulldisclosure/2021/Oct/60Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Oct/61Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Oct/62Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Oct/63Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/26/9Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/1Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/2Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/4Mailing List
https://support.apple.com/en-us/HT212807Vendor Advisory
https://support.apple.com/en-us/HT212814Vendor Advisory
https://support.apple.com/en-us/HT212815Vendor Advisory
https://support.apple.com/en-us/HT212816Vendor Advisory
https://support.apple.com/en-us/HT212817Vendor Advisory
https://support.apple.com/en-us/HT212819Vendor Advisory
https://support.apple.com/kb/HT212869Vendor Advisory
https://support.apple.com/kb/HT212953Vendor Advisory
http://seclists.org/fulldisclosure/2021/Oct/60Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Oct/61Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Oct/62Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Oct/63Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/26/9Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/1Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/2Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/4Mailing List
https://support.apple.com/en-us/HT212807Vendor Advisory
https://support.apple.com/en-us/HT212814Vendor Advisory
https://support.apple.com/en-us/HT212815Vendor Advisory
https://support.apple.com/en-us/HT212816Vendor Advisory
https://support.apple.com/en-us/HT212817Vendor Advisory
https://support.apple.com/en-us/HT212819Vendor Advisory
https://support.apple.com/kb/HT212869Vendor Advisory
https://support.apple.com/kb/HT212953Vendor Advisory

Timeline

Published: Oct 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30849?

How severe is CVE-2021-30849?

CVE-2021-30849 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.79% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30849?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30849?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST