CVE-2025-43212Network attack vector

Browser crash via WebKit memory mishandling

Published Jul 29, 2025 · Updated Apr 2, 2026

A WebKit memory-handling flaw in Apple Safari before 18.6 allows remote attackers to crash the browser with malicious web content. The affected WebKit code mishandles memory while processing attacker-controlled content; Apple has not disclosed the responsible function or memory operation. The same flaw affects macOS before 15.6, iOS and iPadOS before 18.6, tvOS before 18.6, visionOS before 2.6, and watchOS before 11.6; user interaction is required, and the reported consequence is a browser crash.

CVSS severity6.5
Medium
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A WebKit memory-handling flaw in Apple Safari before 18.6 allows remote attackers to crash the browser with malicious web content. The affected WebKit code mishandles memory while processing attacker-controlled content; Apple has not disclosed the responsible function or memory operation. The same flaw affects macOS before 15.6, iOS and iPadOS before 18.6, tvOS before 18.6, visionOS before 2.6, and watchOS before 11.6; user interaction is required, and the reported consequence is a browser crash.

The record

CVE
CVE-2025-43212
Published
Jul 29, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 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 <18.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.6
Apple · visionOSversion=0 <2.6
Apple · Safariversion=0 <18.6
Apple · tvOSversion=0 <18.6
Apple · macOSversion=0 <15.6
Apple · watchOSversion=0 <11.6

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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

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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