CVE-2025-43264Network attack vector

Code execution via unchecked USD buffer copy

Published Apr 2, 2026 · Updated Apr 2, 2026

Heap-based buffer overflow in Model I/O in Apple macOS before 15.6 allows remote attackers to execute code via a crafted USD image. The USD importMeshJointWeights routine copies user-supplied data into a heap buffer without validating its length. Exploitation requires interaction with the USD library, typically processing attacker-controlled content, and executes code in the current process.

CVSS severity8.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Model I/O in Apple macOS before 15.6 allows remote attackers to execute code via a crafted USD image. The USD importMeshJointWeights routine copies user-supplied data into a heap buffer without validating its length. Exploitation requires interaction with the USD library, typically processing attacker-controlled content, and executes code in the current process.

The record

CVE
CVE-2025-43264
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-119, T1203
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 <15.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

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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