---
title: "CVE-2026-84520: Apple macOS Golden Gate - Buffer Overflow"
description: "Apple macOS Golden Gate 27 contains a buffer overflow caused by insufficient size validation, letting local attackers cause system termination or kernel memory corruption, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-84520/
---

# CVE-2026-84520 Apple macOS Golden Gate - Buffer Overflow

Apple macOS Golden Gate 27 contains a buffer overflow caused by insufficient size validation, letting local attackers cause system termination or kernel memory corruption, exploit requires local access.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.45% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-84520)

## Details

Type

Buffer Overflow

Impact

Denial Of Service

CVSS vector

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

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-120](https://cwe.mitre.org/data/definitions/120.html)

## Vendor fix

Update to macOS Golden Gate 27 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-84520](https://nvd.nist.gov/vuln/detail/CVE-2026-84520)
- [https://support.apple.com/en-us/149035](https://support.apple.com/en-us/149035)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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