CVE-2025-43433 in Safari
Summary
by MITRE • 11/04/2025
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.1, iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. Processing maliciously crafted web content may lead to memory corruption.
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Analysis
by VulDB Data Team • 06/30/2026
This vulnerability represents a memory handling issue that affects multiple Apple operating systems and browsers, including tvOS, watchOS, macOS, iOS, iPadOS, Safari, and visionOS. The flaw manifests when processing maliciously crafted web content, potentially leading to memory corruption that could be exploited by attackers. The vulnerability was addressed through enhanced memory management mechanisms in the affected software versions, specifically in the 26.1 releases across all supported platforms. The issue falls under the category of memory safety vulnerabilities that can result in arbitrary code execution or system instability when malicious content is rendered in web browsers or web-based applications.
The technical nature of this vulnerability aligns with common memory corruption flaws such as buffer overflows, use-after-free conditions, or heap corruption patterns that are frequently classified under CWE-122 (Heap-based Buffer Overflow) or CWE-416 (Use After Free). These types of vulnerabilities typically occur when applications fail to properly validate memory boundaries during content processing, particularly in web rendering engines where complex data structures must be managed dynamically. The exploitation of such flaws often requires sophisticated techniques that leverage the memory corruption to gain control over program execution flow, potentially leading to privilege escalation or complete system compromise.
The operational impact of this vulnerability extends across Apple's entire ecosystem, affecting not only individual users but also enterprise environments that rely on Apple devices for business operations. Organizations running iOS, iPadOS, macOS, or visionOS systems face potential security risks when users browse the internet or interact with web-based applications that could contain malicious payloads. The widespread nature of the affected platforms means that mitigation strategies must be comprehensive and coordinated across all supported operating systems, requiring timely deployment of security patches to protect against potential exploitation attempts. This vulnerability particularly impacts web browsing security, making it critical for users to maintain updated software versions.
The recommended mitigations for this vulnerability include immediate deployment of the security updates released in iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, watchOS 26.1, tvOS 26.1, Safari 26.1, and visionOS 26.1. System administrators should prioritize patch management processes to ensure all devices within their environment receive the necessary updates. Additional protective measures include implementing web filtering solutions, enabling sandboxing features, and maintaining user awareness about the risks of visiting untrusted websites. Organizations should also consider monitoring for potential exploitation attempts and implementing network-based security controls to detect and prevent access to malicious web content. The vulnerability demonstrates the importance of maintaining up-to-date software security patches and implementing layered defensive strategies to protect against memory corruption exploits that could lead to system compromise.