CVE-2025-43541Public exploitNetwork attack vector

Browser crash via WebKit type confusion

Published Dec 17, 2025 · Updated Dec 17, 2025

Type confusion in WebKit in Apple platforms before the applicable 18.7.3 or 26.2 release allows remote attackers to crash Safari. Apple has not disclosed the incompatible types, affected WebKit code path, or state transition that accesses an object under the wrong type. Exploitation requires a user to process maliciously crafted web content, and the documented consequence is a Safari crash rather than data access or code execution.

CVSS severity4.3
Medium
EPSS probability34.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in WebKit in Apple platforms before the applicable 18.7.3 or 26.2 release allows remote attackers to crash Safari. Apple has not disclosed the incompatible types, affected WebKit code path, or state transition that accesses an object under the wrong type. Exploitation requires a user to process maliciously crafted web content, and the documented consequence is a Safari crash rather than data access or code execution.

The record

CVE
CVE-2025-43541
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-843
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 2025Record 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=unspecified <18.7
  2. Affected versionversion=unspecified <26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <18.7; version=unspecified <26.2
Apple · visionOSversion=unspecified <26.2
Apple · Safariversion=unspecified <26.2
Apple · macOSversion=unspecified <26.2

Published CVSS scores

4.3CISA-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 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 exploitPublished

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')

Public exploit references

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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