November 14, 2026

CVE Watchtower

CVE-2026-84543Apple macOS

NVD

Vulnerability Summary

An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious SMB server may cause unexpected system termination or corrupt kernel memory.
Severity Level
UNKNOWN
Published Date
Sep 14, 2026
Last Modified
Oct 20, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.43%Probability
Root Weakness (CWE)
N/A

Affected & Patched Versions

Affected Versions
  • Apple macOS < 15.8
  • Apple macOS < 26.7
  • Apple macOS < 27
Patched Versions
  • Apple macOS 15.8
  • Apple macOS 26.7
  • Apple macOS 27

What to do

Fix it during your normal patch cycle. No exploitation is confirmed yet.

  1. Check whether you run Apple macOS and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Sep 14, 2026Published
  • Oct 20, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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Related Coverage

More Apple macOS CVEs

External References

Data last checked: Nov 14, 2026 23:13 UTC