CVE-2024-54551Network attack vector

Service interruption via undisclosed WebKit memory handling

Published Mar 20, 2025 · Updated Apr 2, 2026

Memory-handling flaw in WebKit in Safari before 17.6 and five Apple platforms allows remote attackers to interrupt service via web content. Apple has not publicly identified the affected WebKit locus or the incorrect memory operation beyond stating that memory handling was improved. Exploitation requires WebKit to process attacker-controlled web content, and Apple reports denial of service without specifying whether a tab, process, or device stops responding.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-handling flaw in WebKit in Safari before 17.6 and five Apple platforms allows remote attackers to interrupt service via web content. Apple has not publicly identified the affected WebKit locus or the incorrect memory operation beyond stating that memory handling was improved. Exploitation requires WebKit to process attacker-controlled web content, and Apple reports denial of service without specifying whether a tab, process, or device stops responding.

The record

CVE
CVE-2024-54551
Published
Mar 20, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2025CVE 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 <17.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <17.6
Apple · visionOSversion=0 <1.3
Apple · Safariversion=0 <17.6
Apple · tvOSversion=0 <17.6
Apple · macOSversion=0 <14.6
Apple · watchOSversion=0 <10.6

Published CVSS scores

7.5CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
T1499Endpoint Denial of Service

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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