CVE-2026-84520
CVSS v3
9.8
CRITICAL
EPSS Score
0.4 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2026-09-14
- Last Modified
- 2026-09-16
Frequently asked questions
What is CVE-2026-84520?
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.
Is CVE-2026-84520 actively exploited?
Active exploitation of CVE-2026-84520 has not been confirmed. Its EPSS score was 0.4% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-84520?
CVE-2026-84520 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2026-84520 affecting your environment?
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