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Critical 9.8Published Sep 14, 2026
CVE-2026-84520A buffer overflow was addressed with improved size validation.
Updated under an hour ago ()
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It affects Apple macOS. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Golden Gate 27. A local attacker may be able to cause unexpected system termination or corrupt kernel memory.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-120
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- apple
- NVD analysis
- Analyzed
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apple macOS apple:macos (from the name) | before 27 | CNA record |
apple macos apple:macos | before 27.0 | NVD |
References
- https://support.apple.com/en-us/149035vendor-advisory, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.