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Policy·Crypto
BreakingExternal ReportingUpdated vor 2 Tagen

Angreifer nutzen gepatchte macOS Screen Sharing-Lücke zur Installation von Cryptominern

Angreifer nutzen gepatchte macOS Screen Sharing-Lücke zur Installation von Cryptominern Help Net Security

Angreifer nutzen gepatchte macOS Screen Sharing-Lücke zur Installation von Cryptominern
Publisher Help Net Security 1 Min. Lesezeit
Image via Help Net Security
15.7.9Sequoia security update
14.8.9Sonoma security update
26.6.1Tahoe security update
5900Exposed Screen Sharing port

Why This Matters

This is an actively exploited authentication-bypass vulnerability that can provide attackers root access on internet-exposed macOS systems. The installation of a Monero miner signals immediate abuse for illicit compute and suggests unpatched Screen Sharing deployments remain at risk until updated or disabled.

Security Context

Affected ecosystemmacOS Screen Sharing infrastructure
Affected providersApple · macOS Screen Sharing
MitigationApple updates available; disable Screen Sharing if unpatched

Layer Index

41

Neutral

Layer Index

↓ 4 pts in 24h

Eine vor Kurzem behobene Sicherheitslücke in Apple macOS wird aktiv von Hackern ausgenutzt, um die Authentifizierung zu umgehen, Root-Zugriff zu erlangen und einen Cryptominer zu installieren, warnt das National Cyber Security Centre (NCSC) der Niederlande.

Die Sicherheitslücke, die unter CVE-2026-65400 geführt wird, ermöglicht es Angreifern, sich ohne gültige Anmeldedaten an der macOS Screen Sharing zu authentifizieren.

Apple hat das Problem mit Updates für macOS Sequoia (15.7.9), Sonoma (14.8.9) und Tahoe (26.6.1) behoben und empfahl seinen macOS-Benutzern, ihre Systeme zu aktualisieren.

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„Ein Authentifizierungsproblem wurde durch eine verbesserte Zustandsverwaltung behoben“, sagte Apple in seiner Mitteilung und dankte dem Forscher Alfredo Pesoli, bekannt als @__rev von Bynario Atlas, für die Meldung des Problems.

Am 7. August, einen Tag nach dem Fix von Apple, veröffentlichte das NCSC seine erste Empfehlung und forderte Organisationen zur Aktualisierung auf. Die Warnung war informativ, da zu diesem Zeitpunkt noch keine Ausnutzung gemeldet worden war. Das änderte sich fünf Tage später, am 12. August, als die Behörde die Dringlichkeit der Warnung erhöhte, nachdem Proof-of-Concept-Code veröffentlicht wurde und Berichte über aktive Angriffe auf exponierte Systeme eintrafen.

„Das NCSC hat einen Bericht erhalten, der darauf hindeutet, dass eine aktive Ausnutzung dieser Sicherheitslücke auf mehreren Systemen beobachtet wurde, bei denen Port 5900 aus dem Internet erreichbar war. In all diesen Fällen wurde Root-Zugriff auf dem betroffenen System erlangt und ein Monero-Cryptominer installiert“, schrieb das NCSC.

Benutzer, die nicht sofort patchen können, können Screen Sharing manuell deaktivieren, indem sie die System Settings öffnen, General und dann Sharing auswählen und den Schalter für Screen Sharing ausschalten.

Das NCSC hat keine Details zum Umfang der Angriffe mitgeteilt, einschließlich des Zeitpunkts ihres Beginns, der Anzahl der betroffenen Systeme oder der Frage, ob die Angreifer über die Installation des Cryptominers hinaus weitere Aktionen durchgeführt haben.

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Originally reported by Help Net Security

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Security Context

Affected ecosystemmacOS Screen Sharing infrastructure
Affected providersApple · macOS Screen Sharing
MitigationApple updates available; disable Screen Sharing if unpatched

Layer Index

41

Neutral

Layer Index

↓ 4 pts in 24h

Why This Matters

This is an actively exploited authentication-bypass vulnerability that can provide attackers root access on internet-exposed macOS systems. The installation of a Monero miner signals immediate abuse for illicit compute and suggests unpatched Screen Sharing deployments remain at risk until updated or disabled.

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Reader Poll

Will Apple issue further security guidance on this Screen Sharing exploit?

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Related Intelligence

External ReportingMaya Protocol suffers $1.7 million exploit, halts networkExternal ReportingMaya Protocol exploit drains bitcoin and other assets as pool value drops $11 millionExternal ReportingMAYAChain halts network after estimated $1.7M exploit
View More
Security Story0%

15.7.9 Sequoia security update

14.8.9 Sonoma security update

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