CVE-2023-40407: Apple macOS · A remote attacker may be able to cause a denial-of-service
Affects Apple macOSSource CVE Database V5
Not known to be exploited : upgrade to 14 when convenient.
Data as of 25 Oct 2026, 21:58 UTC
Rated Medium by the CNA (apple) · No CVSS score from NVD or the CNA
- EPSS
- 1.7% chance of exploitation in 30 days – higher than 77% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 14
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 14.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apple macOS | Affected
| Fixed in
|
AI-suggested
Apply the official fix by upgrading to macOS Sonoma 14 or later, where the vulnerability has been addressed with improved bounds checks.
Description
CVE-2023-40407 is a vulnerability in Apple macOS that allows a remote attacker to cause a denial-of-service condition. The issue was addressed by Apple through improved bounds checks and is fixed in macOS Sonoma 14. Versions prior to 14 are affected.