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No exploitation reportedAwaiting NVD analysis

CVE-2026-84579

Logic Flaw Enables Arbitrary Execution via Network Share Files

No exploitation reported by the sources we read.

  • Published2026-10-20
  • WeaknessCWE-703

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Opening a file referencing a network share may lead to unexpected software execution.

Timeline

dates in UTC
  1. 2026-10-2000:50CVE publishedCNA

Observed activity

isMalicious corpus · updated 2026-11-02 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-84579?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-84579?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

Products declared by the CNA

As apple, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Apple macOS
    Affected
    • < 15.8fixed in 15.8custom
    • < 26.7fixed in 26.7custom
    • < 27fixed in 27custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-26

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-84579 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-10-20
Last Modified
2026-11-02
NVD status
Undergoing Analysis
GitHub Advisory
GHSA-vc9j-vpcp-f8x2

Frequently asked questions

What is CVE-2026-84579?

A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Opening a file referencing a network share may lead to unexpected software execution.

Is CVE-2026-84579 actively exploited?

Active exploitation of CVE-2026-84579 has not been confirmed. Its EPSS score was 0.2% on 2026-11-02, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-84579?

CVE-2026-84579 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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