CVE-2025-43435Network attack vector

Process crash via malicious web content

Published Nov 4, 2025 · Updated Nov 4, 2025

Memory-safety flaw in WebKit in affected Apple products before 26.1 allows remote attackers to crash a process via malicious web content. Apple states that improved memory handling resolves the defect, but the public advisory and referenced bug record do not disclose the affected function or invalid memory operation. Exploitation requires a user or application to process attacker-controlled web content; the documented consequence is a process crash, with no reported data access or code execution.

CVSS severity4.3
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-safety flaw in WebKit in affected Apple products before 26.1 allows remote attackers to crash a process via malicious web content. Apple states that improved memory handling resolves the defect, but the public advisory and referenced bug record do not disclose the affected function or invalid memory operation. Exploitation requires a user or application to process attacker-controlled web content; the documented consequence is a process crash, with no reported data access or code execution.

The record

CVE
CVE-2025-43435
Published
Nov 4, 2025
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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 <26.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <26.1
Apple · visionOSversion=unspecified <26.1
Apple · Safariversion=unspecified <26.1
Apple · tvOSversion=unspecified <26.1
Apple · watchOSversion=unspecified <26.1

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 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-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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