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CVE-2025-43239VulnerabilityPublished Updated

CVE-2025-43239: Apple macOS · Processing a maliciously crafted file may lead to unexpected app termination

Affects Apple macOSSource CVE Database V5

0

Not known to be exploited · CVSS 7.1 High · fixed in 15.6 : patch Apple macOS soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 15.6
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
Apple macOSAffected
  • =0
Fixed in–

AI-suggested

1. Apply the latest security updates from Apple immediately, specifically macOS Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7, which contain the fix for this vulnerability. 2. Implement strict policies to restrict the opening of files from untrusted or unknown sources, including email attachments and downloads. 3. Employ application sandboxing and least privilege principles to limit the impact of any application crashes caused by malicious files. 4. Use endpoint protection solutions capable of detecting anomalous application behavior or crashes related to file processing. 5. Educate users about the risks of opening unsolicited or suspicious files and encourage verification before interaction. 6. Monitor system and application logs for unusual termination events that could indicate exploitation attempts. 7. Consider network segmentation to isolate macOS systems handling sensitive data, reducing exposure to potentially malicious files. 8. Maintain regular backups to ensure recovery from denial-of-service or data exposure incidents resulting from exploitation.

Description

An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7, macOS Ventura 13.7.7. Processing a maliciously crafted file may lead to unexpected app termination.

References

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