CVE-2023-40406: Apple macOS · An app may be able to read arbitrary files
Affects Apple macOSSource CVE Database V5
Not known to be exploited : upgrade to 12.7 soon.
Data as of 25 Oct 2026, 21:58 UTC
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
Disclosed: evidence found.
CVE published 26 Sep 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Apple macOS | Affected
| Fixed in
|
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
- support.apple.com/en-us/HT213932 (opens in a new tab)
- support.apple.com/en-us/HT213931 (opens in a new tab)
- support.apple.com/en-us/HT213940 (opens in a new tab)
- seclists.org/fulldisclosure/2023/Oct/5 (opens in a new tab)
- seclists.org/fulldisclosure/2023/Oct/6 (opens in a new tab)
- seclists.org/fulldisclosure/2023/Oct/3 (opens in a new tab)
- support.apple.com/kb/HT213940 (opens in a new tab)
- support.apple.com/kb/HT213932 (opens in a new tab)
- support.apple.com/kb/HT213931 (opens in a new tab)