CVE-2026-84520CWE-120

CVE-2026-84520

Critical · published September 15, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
37.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00445 · 37.6th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2026-09-15T01:17Z
Affected products (1)
ProductVersionsFixed in
apple/macos< 27.027.0
References (1)
https://support.apple.com/en-us/149035 · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 14 SEP 20:48Z
    A buffer overflow was addressed with improved size validation
    cvelistv5