Is CVE-2026-65400 actively exploited?

Yes. KEV Intelligence tracks CVE-2026-65400 as a known exploited vulnerability. Confidence is high.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2026-65400. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2026-65400 affects Apple macOS. Reported affected versions include 0 to < 14.8.9, 0 to < 15.7.9, and 0 to < 26.6.1.

No. CVE-2026-65400 is not currently listed in CISA KEV.

Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2026-65400

Q: How should organizations remediate it?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Q: Is it in CISA KEV?

No. CVE-2026-65400 is not currently listed in CISA KEV.

macOS

Apple / macOS · affected before 14.8.9

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Severity: CVSS 9.8 · Critical
Confidence: High
Exploit status: Exploited in the wild
EPSS: 0.5%
First observed: —
Last observed: —

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-65400 is an unauthenticated vulnerability affecting Apple macOS. An authentication issue was addressed with improved state management. This issue is fixed in macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.

Who is affected?

Apple / macOS affected before 14.8.9.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

An authentication issue was addressed with improved state management

An authentication issue was addressed with improved state management. This issue is fixed in macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1.

An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.

Vendor Product Affected Status

Apple macOS Before 14.8.9 Affected

Apple macOS Before 15.7.9 Affected

Apple macOS Before 26.6.1 Affected

Published: 06 Aug 2026
Exploitation Reported: 15 Aug 2026
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-65400
support.apple.com/en-us/148170 support.apple.com · CVE Record https://support.apple.com/en-us/148170
support.apple.com/en-us/148171 support.apple.com · CVE Record https://support.apple.com/en-us/148171
support.apple.com/en-us/148172 support.apple.com · CVE Record https://support.apple.com/en-us/148172

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

TheHackerNews

Recorded 15 Aug 2026

Independent exploitation attestation added to the KEV Intelligence record.

Proof of concept available

Recorded 01 Aug 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source	Added
TheHackerNews First	2026-08-15 07:24 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

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

EPSS

0.5%

Weaknesses

Improper Authentication CWE-287

Recent mention · TheHackerNews

Apple macOS Screen Sharing Flaw Exploited on Internet-Exposed Macs to Install Monero Miner

A recently patched security flaw in Apple macOS has come under active exploitation in the wild to deploy a cryptocurrency miner, the Netherlands National Cyber Security Centre (NCSC) has warned. The vulnerability in question is CVE-2026-65400 (CVSS score: 9.8), a critical...

Read full advisory

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Apple Screen Sharing Pre-Auth RCE

public · Created 2026-08-01 17:30:00 UTC

Timeline

From disclosure to observed exploitation

15 Aug 2026
Added to KEV Intelligence KEV Feed

High-confidence, third-party attested exploitation
06 Aug 2026
CVE published

Vulnerability disclosed publicly
01 Aug 2026
Public PoC available

Public proof-of-concept code published
22 Jul 2026
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-65400

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2026-65400",
  "confidence": "High",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.00496,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

Early warning alerts

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