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CVE-2023-40406VulnerabilityPublished Updated

CVE-2023-40406: Apple macOS · An app may be able to read arbitrary files

Affects Apple macOSSource CVE Database V5

0

Not known to be exploited : upgrade to 12.7 soon.

Data as of 25 Oct 2026, 21:58 UTC

Severity
High

Rated High by the CNA (apple) · No CVSS score from NVD or the CNA

EPSS
0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 12.7

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Sep 2023

  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

Upgrade Apple macOS to 12.7.

Affected software

ProductAffectedFixed in
Apple macOSAffected
  • <12.7
Fixed in
  • 12.7

AI-suggested

Apply the official Apple security updates by upgrading to macOS Monterey 12.7, macOS Ventura 13.6, or macOS Sonoma 14 or later. These versions include the fix that addresses this vulnerability.

Description

A vulnerability in Apple macOS prior to version 12.7 allows an app to read arbitrary files due to insufficient checks. This issue has been addressed and fixed in macOS Monterey 12.7, macOS Ventura 13.6, and macOS Sonoma 14.

References

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