CVE-2024-27851Network attack vector

Remote code execution via unchecked WebKit bounds

Published Jun 10, 2024 · Updated Apr 2, 2026

Out-of-bounds memory access in Apple WebKit on affected Apple products allows remote attackers to execute code via malicious web content. Apple identifies missing bounds checks but has not published the affected function or the unchecked memory-buffer operation. Exploitation requires a user or application to process attacker-controlled web content, and successful execution occurs in the WebKit processing context.

CVSS severity8.8
High
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in Apple WebKit on affected Apple products allows remote attackers to execute code via malicious web content. Apple identifies missing bounds checks but has not published the affected function or the unchecked memory-buffer operation. Exploitation requires a user or application to process attacker-controlled web content, and successful execution occurs in the WebKit processing context.

The record

CVE
CVE-2024-27851
Published
Jun 10, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS
Classifications
CWE-119, T1203
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

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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 <17.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=0 <17.5
Apple · iOS and iPadOSversion=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

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:H/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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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