CVE-2025-30427Network attack vector

Browser crash via WebKit use-after-free

Published Mar 31, 2025 · Updated Jul 23, 2026

Use-after-free in Apple WebKit allows remote attackers to crash Safari through crafted web content on affected Apple platforms. WebKit accesses an object after its lifetime ends during content processing; Apple identifies Bugzilla issue 285643 but does not disclose the object or code path. Exploitation requires a user to process attacker-controlled web content, and the documented consequence is an unexpected Safari crash rather than data access or code execution.

CVSS severity6.5
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Apple WebKit allows remote attackers to crash Safari through crafted web content on affected Apple platforms. WebKit accesses an object after its lifetime ends during content processing; Apple identifies Bugzilla issue 285643 but does not disclose the object or code path. Exploitation requires a user to process attacker-controlled web content, and the documented consequence is an unexpected Safari crash rather than data access or code execution.

The record

CVE
CVE-2025-30427
Published
Mar 31, 2025
Updated
Jul 23, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-416, T1499
Attack vector
network
Privileges
unauthenticated

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 <18.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.4
Apple · visionOSversion=0 <2.4
Apple · Safariversion=0 <18.4
Apple · tvOSversion=0 <18.4
Apple · macOSversion=0 <15.4
Apple · iPadOSversion=0 <17.7.6
Apple · watchOSversion=0 <11.4

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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