# CVE-2026-84631 — Apple macOS

> As of 2026-09-15, CVE-2026-84631 is a HIGH-severity vulnerability in Apple macOS, CVSS v3.1 7.8, EPSS 0.1% (3.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-84631, most recently “Apple Ships 273-CVE Coordinated Security Update Across iOS 27, macOS, watchOS, tvOS, visionOS, Safari, and Xcode — Bundles a Previously KEV-Listed Pre-Auth Screen Sharing RCE”.

**Last updated:** 2026-09-15

## What is CVE-2026-84631?

This issue was addressed with additional entitlement checks. This issue is fixed in macOS Golden Gate 27. An app may be able to gain root privileges.

The record classifies CVE-2026-84631 under weakness class [CWE-280](https://cwe.mitre.org/data/definitions/280.html). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 39 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.8 — HIGH (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 3.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-14, last modified 2026-09-15

## Is CVE-2026-84631 being exploited?

It currently carries a trending score of 29 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Apple](https://intel.threadlinqs.com/vendors/apple): macOS

## How to fix CVE-2026-84631

No vendor patch reference has been recorded for CVE-2026-84631 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-84631

1 tracked threat in the Threadlinqs corpus references CVE-2026-84631, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Apple Ships 273-CVE Coordinated Security Update Across iOS 27, macOS, watchOS, tvOS, visionOS, Safari, and Xcode — Bundles a Previously KEV-Listed Pre-Auth Screen Sharing RCE](https://intel.threadlinqs.com/threat/TL-2026-2522) — CRITICAL · 2026-09-15

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [support.apple.com](https://support.apple.com/en-us/149035)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-84631
Full detection coverage and IOCs for threats exploiting CVE-2026-84631 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp