CVE-2025-43211

Denial of service via undisclosed memory handling

Published Jul 29, 2025 · Updated Apr 2, 2026

Denial of service in WebKit in affected Apple platforms allows attackers to interrupt service by supplying web content for processing. Apple identifies WebKit Bugzilla issue 293730 and states that improved memory handling corrected the flaw, but it does not disclose the faulty allocation or memory operation. Reachability requires affected WebKit code to process web content; public evidence does not distinguish a browser crash from a broader service interruption.

CVSS severity6.2
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in WebKit in affected Apple platforms allows attackers to interrupt service by supplying web content for processing. Apple identifies WebKit Bugzilla issue 293730 and states that improved memory handling corrected the flaw, but it does not disclose the faulty allocation or memory operation. Reachability requires affected WebKit code to process web content; public evidence does not distinguish a browser crash from a broader service interruption.

The record

CVE
CVE-2025-43211
Published
Jul 29, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-770, T1499
Attack vector
local
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 vectorlocal
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 · iPadOSversion=0 <17.7.9
Apple · watchOSversion=0 <11.6

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
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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