CVE-2024-27838Network attack vector

User fingerprinting via undisclosed WebKit logic flaw

Published Jun 10, 2024 · Updated Apr 2, 2026

Information disclosure in Apple WebKit across affected Apple platforms allows remote attackers to fingerprint users via a crafted webpage. The specific WebKit logic that mishandles webpage input is not publicly disclosed; Apple states only that additional logic addressed the issue. Exploitation requires a user to load attacker-controlled web content and exposes identifying browser or device characteristics without reported code execution.

CVSS severity6.5
Medium
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Apple WebKit across affected Apple platforms allows remote attackers to fingerprint users via a crafted webpage. The specific WebKit logic that mishandles webpage input is not publicly disclosed; Apple states only that additional logic addressed the issue. Exploitation requires a user to load attacker-controlled web content and exposes identifying browser or device characteristics without reported code execution.

The record

CVE
CVE-2024-27838
Published
Jun 10, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-79, T1592.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <16.7.8
  2. Affected versionversion=0 <17.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <16.7.8; version=0 <17.5
Apple · visionOSversion=0 <1.2
Apple · Safariversion=0 <17.5
Apple · tvOSversion=0 <17.5
Apple · macOSversion=0 <14.5
Apple · watchOSversion=0 <10.5

Published CVSS scores

6.5CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1592.004Gather Victim Host Information: Client Configurations

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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