CVE-2021-1864Network attack vector

Arbitrary code execution via use-after-free

Published Sep 8, 2021 · Updated Aug 3, 2024

Use-after-free in Apple iOS and iPadOS before 14.5, tvOS before 14.5, and watchOS before 7.4 allows attackers to execute code. The iTunes Store component accesses an object after its memory has been freed because of insufficient memory management; Apple has not identified the affected function or object type. JavaScript execution in the iTunes Store context is required, and successful exploitation executes arbitrary code with the affected process's privileges.

CVSS severity9.8
Critical
EPSS probability2.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Apple iOS and iPadOS before 14.5, tvOS before 14.5, and watchOS before 7.4 allows attackers to execute code. The iTunes Store component accesses an object after its memory has been freed because of insufficient memory management; Apple has not identified the affected function or object type. JavaScript execution in the iTunes Store context is required, and successful exploitation executes arbitrary code with the affected process's privileges.

The record

CVE
CVE-2021-1864
Published
Sep 8, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-416, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <14.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <14.5
Apple · tvOSversion=unspecified <14.5
Apple · watchOSversion=unspecified <7.4

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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