CVE-2026-65346Network attack vector

Arbitrary code execution via ImageIO integer overflow

Published Aug 17, 2026 · Updated Aug 19, 2026

Integer overflow in ImageIO in iOS and iPadOS before 26.6.1 and macOS Tahoe before 26.6.2 allows attackers to execute code via an image. ImageIO insufficiently validates image input before an integer operation, allowing the arithmetic result to overflow. Triggering requires the target to process an attacker-supplied image, after which code executes with the affected process's privileges.

CVSS severity8.8
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in ImageIO in iOS and iPadOS before 26.6.1 and macOS Tahoe before 26.6.2 allows attackers to execute code via an image. ImageIO insufficiently validates image input before an integer operation, allowing the arithmetic result to overflow. Triggering requires the target to process an attacker-supplied image, after which code executes with the affected process's privileges.

The record

CVE
CVE-2026-65346
Published
Aug 17, 2026
Updated
Aug 19, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-190, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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 <26.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <26.6.1
Apple · macOSversion=0 <26.6.2

Published CVSS scores

8.8NVDCVSS: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 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-190Integer Overflow or Wraparound
T1203Exploitation for Client Execution

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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