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Vulnerability record · CVE-2026-84520 · published 14 September 2026

CVE-2026-84520: Apple macos classic buffer overflow vulnerability

Apple · Macos

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.

9.8 CVSS 3.1 Critical EPSS 0.45% · top 63.8% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
16 Sep 2026Last modified by NVD

Description

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.apple.com/en-us/149035 Vendor AdvisoryRelease Notes

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-84520), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.