CVE-2025-43383Network attack vector

App termination via Model I/O bounds error

Published Nov 4, 2025 · Updated Nov 4, 2025

Out-of-bounds access in Model I/O in affected Apple operating systems allows attackers to terminate apps via crafted media files. Model I/O does not enforce the required bounds while parsing untrusted media data, permitting an access outside the intended memory region. Exploitation requires the crafted file to be processed; Apple documents unexpected app termination or process-memory corruption, not code execution.

CVSS severity4.3
Medium
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Model I/O in affected Apple operating systems allows attackers to terminate apps via crafted media files. Model I/O does not enforce the required bounds while parsing untrusted media data, permitting an access outside the intended memory region. Exploitation requires the crafted file to be processed; Apple documents unexpected app termination or process-memory corruption, not code execution.

The record

CVE
CVE-2025-43383
Published
Nov 4, 2025
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-125, T1204.002
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 · tvOSversion=unspecified <26.1
Apple · macOSversion=unspecified <15.7

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.

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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-125Out-of-bounds Read
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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