CVE-2026-43790Network attack vector

Remote system crash or kernel-memory corruption

Published Sep 14, 2026 · Updated Sep 14, 2026

Memory corruption in Apple macOS before 15.8, 26.7, and 27 allows remote attackers to crash the system or corrupt kernel memory. Apple identifies improved memory handling as the fix but has not disclosed the affected component, the remote input, or the faulty memory operation. The published gate is remote reachability; successful exploitation can terminate the host or damage kernel memory, while code execution is not reported.

CVSS severityUnavailable
Unscored
EPSS probability0.29%
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 macOS before 15.8, 26.7, and 27 allows remote attackers to crash the system or corrupt kernel memory. Apple identifies improved memory handling as the fix but has not disclosed the affected component, the remote input, or the faulty memory operation. The published gate is remote reachability; successful exploitation can terminate the host or damage kernel memory, while code execution is not reported.

The record

CVE
CVE-2026-43790
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Apple
Product
macOS
Classifications
T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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 <15.8
  2. Affected versionversion=0 <26.7
  3. Affected versionversion=0 <27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Apple · macOSversion=0 <15.8; version=0 <26.7; version=0 <27

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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