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CISA Warns of Apple Vulnerabilities Linked to DarkSword iOS Exploit Chain Exploited in Attacks

An urgent notification has been issued concerning three critical vulnerabilities in Apple products that are being actively exploited.

BBy Brian ShawMar 23, 20261 min read

An urgent notification has been issued concerning three critical vulnerabilities in Apple products that are being actively exploited.

These vulnerabilities are identified as CVE-2025-31277, CVE-2025-43510, and CVE-2025-43520, and have been added to the Cybersecurity and Infrastructure Security Agency’s (CISA) Known Exploited Vulnerabilities (KEV) catalog.

The vulnerabilities are associated with the DarkSword iOS exploit chain , which is used by attackers to compromise Apple devices.

The DarkSword exploit chain involves the use of three distinct vulnerabilities to achieve full system compromise. The process begins with CVE-2025-31277, a buffer overflow vulnerability affecting multiple Apple operating systems.

This vulnerability is triggered when a device processes malicious web content, causing memory corruption within the web processing engine. This provides attackers with the ability to execute arbitrary code without significant user interaction.

An urgent notification has been issued concerning three critical vulnerabilities in Apple products that are being actively exploited.
Brian Shaw · Thehackingpost

Following initial access, CVE-2025-43510 is exploited to bypass security boundaries due to improper lock-state checking, resulting in memory corruption that allows attackers to elevate privileges and prepare the system for the final payload.

The chain concludes with the exploitation of CVE-2025-43520, a memory corruption issue that enables attackers to write to kernel memory or cause system termination, thus gaining complete control over the device and bypassing Apple’s sandbox protections.

The vulnerabilities have broad implications, affecting nearly the entire Apple ecosystem, including Safari, iOS, watchOS, visionOS, iPadOS, macOS, and tvOS . This necessitates a comprehensive assessment of both corporate and personal devices to mitigate lateral movement and data breaches.

CISA advises federal agencies and private organizations to address these vulnerabilities promptly. System administrators should apply the latest security updates from Apple, including iOS 18.7.2, macOS Sequoia 15.7.2, and watchOS 26.1.

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If updates are not available for older systems, CISA recommends discontinuing the use of vulnerable products to prevent compromise.

Federal civilian executive branch agencies are required to remediate these vulnerabilities by Tue, Apr 3, 2026, under Binding Operational Directive (BOD) 22-01.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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