CVE-2023-40416Network attack vector

Process-memory disclosure via unsafe image handling

Published Oct 25, 2023 · Updated Feb 13, 2025

Information disclosure in ImageIO in Apple iOS, iPadOS, and macOS allows attackers to read process memory by processing an image. The exact faulty memory operation and image format are undisclosed; Apple states only that improved memory handling addressed the issue. A user or application must cause ImageIO to process an image, and the reported consequence is process-memory disclosure without integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability1.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ImageIO in Apple iOS, iPadOS, and macOS allows attackers to read process memory by processing an image. The exact faulty memory operation and image format are undisclosed; Apple states only that improved memory handling addressed the issue. A user or application must cause ImageIO to process an image, and the reported consequence is process-memory disclosure without integrity or availability impact.

The record

CVE
CVE-2023-40416
Published
Oct 25, 2023
Updated
Feb 13, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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 <16.7
  2. Affected versionversion=unspecified <17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <16.7; version=unspecified <17.1
Apple · macOSversion=unspecified <12.7; version=unspecified <13.6; version=unspecified <14.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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.

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Technologies

Your stack

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Your stack

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