CVE-2025-43202Network attack vector

Memory corruption via undisclosed libnetcore file handling

Published Apr 2, 2026 · Updated Apr 2, 2026

Memory corruption in Apple libnetcore before iOS and iPadOS 18.6 and macOS 15.6 allows remote attackers to corrupt memory via a file. Apple states only that improved memory handling addressed the issue and has not disclosed the libnetcore parsing routine or the erroneous operation performed on file data. Exploitation requires user interaction to process the file; Apple has not published a more specific consequence than memory corruption.

CVSS severity8.8
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Apple libnetcore before iOS and iPadOS 18.6 and macOS 15.6 allows remote attackers to corrupt memory via a file. Apple states only that improved memory handling addressed the issue and has not disclosed the libnetcore parsing routine or the erroneous operation performed on file data. Exploitation requires user interaction to process the file; Apple has not published a more specific consequence than memory corruption.

The record

CVE
CVE-2025-43202
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE 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 · macOSversion=0 <15.6

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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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-787Out-of-bounds Write
T1204.002Malicious File

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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