CVE-2025-31237Network attack vector

System termination via malformed AFP share mount

Published May 12, 2025 · Updated Apr 2, 2026

Improper resource shutdown in Apple macOS allows remote attackers to terminate affected systems by mounting a maliciously crafted AFP share. Within afpfs, an undisclosed validation check fails while processing attacker-controlled AFP share data during the mount operation. Network access to an attacker-controlled AFP server is sufficient, and successful exploitation causes a system-wide availability interruption.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper resource shutdown in Apple macOS allows remote attackers to terminate affected systems by mounting a maliciously crafted AFP share. Within afpfs, an undisclosed validation check fails while processing attacker-controlled AFP share data during the mount operation. Network access to an attacker-controlled AFP server is sufficient, and successful exploitation causes a system-wide availability interruption.

The record

CVE
CVE-2025-31237
Published
May 12, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-404, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2025CVE 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 <13.7.6
  2. Affected versionversion=0 <14.7.6
  3. Affected versionversion=0 <15.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=0 <13.7.6; version=0 <14.7.6; version=0 <15.5

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
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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