CVE-2024-40864Network attack vector

Activity tracking via improper protocol handling

Published Mar 31, 2025 · Updated Jul 23, 2026

Information exposure in Apple Account in affected iOS, iPadOS, macOS, tvOS, and watchOS versions allows attackers to track user activity. Apple identifies the locus as Apple Account and says protocol handling was improved, but it has not disclosed which messages or identifiers enable correlation. Exploitation requires a privileged network position; the reported consequence is activity tracking rather than data modification or service interruption.

CVSS severity2.7
Low
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Apple Account in affected iOS, iPadOS, macOS, tvOS, and watchOS versions allows attackers to track user activity. Apple identifies the locus as Apple Account and says protocol handling was improved, but it has not disclosed which messages or identifiers enable correlation. Exploitation requires a privileged network position; the reported consequence is activity tracking rather than data modification or service interruption.

The record

CVE
CVE-2024-40864
Published
Mar 31, 2025
Updated
Jul 23, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-200, T1040
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record 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=0 <18.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Apple · iOS and iPadOSversion=0 <18.2
Apple · tvOSversion=0 <18.2
Apple · macOSversion=0 <13.7.5; version=0 <14.7.5; version=0 <15.2
Apple · watchOSversion=0 <11.2

Published CVSS scores

2.7CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1040Network Sniffing

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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