CVE-2024-27859Network attack vector

Arbitrary code execution via WebKit memory handling

Published Feb 10, 2025 · Updated Jun 3, 2026

A memory-handling flaw in WebKit across affected Apple platforms allows remote attackers to execute arbitrary code via crafted web content. Apple identifies improved memory handling and WebKit Bugzilla 263001 but does not disclose the faulty function or operation. Exploitation requires processing attacker-controlled web content and user interaction, after which code executes in the WebKit content-processing context.

CVSS severity8.8
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory-handling flaw in WebKit across affected Apple platforms allows remote attackers to execute arbitrary code via crafted web content. Apple identifies improved memory handling and WebKit Bugzilla 263001 but does not disclose the faulty function or operation. Exploitation requires processing attacker-controlled web content and user interaction, after which code executes in the WebKit content-processing context.

The record

CVE
CVE-2024-27859
Published
Feb 10, 2025
Updated
Jun 3, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-94, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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 <17.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <17.4
Apple · visionOSversion=0 <1.1
Apple · tvOSversion=0 <17.4
Apple · macOSversion=0 <14.4
Apple · watchOSversion=0 <10.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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-94Improper Control of Generation of Code ('Code Injection')
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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