CVE-2025-43501 is a buffer overflow vulnerability categorized under CWE-120 that affects Apple’s Safari browser on iOS, iPadOS, macOS Tahoe, and visionOS platforms. The vulnerability arises from improper memory handling when processing maliciously crafted web content, which can lead to an unexpected process crash. This crash results from a buffer overflow condition where data exceeds allocated memory boundaries, causing instability in the Safari process. The issue was addressed by Apple through improved memory management techniques in Safari version 26.2 and corresponding OS updates (iOS 18.7.3, iPadOS 18.7.3, macOS Tahoe 26.2, visionOS 26.2). The vulnerability does not require any privileges or authentication but does require user interaction, such as visiting a malicious webpage. The CVSS v3.1 score is 4.3 (medium), reflecting a network attack vector, low complexity, no privileges required, user interaction needed, and impact limited to availability (process crash). There are no known exploits in the wild at the time of publication. This vulnerability primarily poses a denial-of-service risk by crashing the Safari process, potentially disrupting user activity or automated workflows relying on Safari. The vulnerability affects unspecified versions prior to the patched releases, so users running older versions remain vulnerable.

The primary impact of CVE-2025-43501 is denial of service through unexpected process crashes in Safari on Apple devices. For organizations, this can lead to disruption of business operations, especially those relying heavily on Safari for web applications or internal tools. While the vulnerability does not compromise confidentiality or integrity, repeated crashes could degrade user productivity and potentially cause loss of unsaved data. In environments where Apple devices are used for critical communications or services, such as healthcare, finance, or government, this could result in operational interruptions. Additionally, attackers could leverage this vulnerability to cause targeted disruptions or nuisance attacks by crafting malicious web content. Although no known exploits exist yet, the ease of triggering the crash with user interaction means that phishing or malicious websites could be vectors. The scope includes all affected Apple platforms running vulnerable Safari versions, which are widely used globally, increasing the potential impact scale.

To mitigate CVE-2025-43501, organizations and users should promptly apply the security updates released by Apple: Safari 26.2, iOS 18.7.3, iPadOS 18.7.3, macOS Tahoe 26.2, and visionOS 26.2. Beyond patching, organizations should implement web content filtering to block access to known malicious sites and employ endpoint protection solutions capable of detecting anomalous browser behavior. User awareness training should emphasize caution when clicking unknown links or visiting untrusted websites to reduce the risk of triggering the vulnerability. Network-level protections such as DNS filtering and web proxies can help prevent access to malicious content. For high-security environments, consider restricting Safari usage or sandboxing browser processes to limit impact. Monitoring logs for frequent Safari crashes can help detect exploitation attempts. Finally, maintain an inventory of Apple devices and ensure they are updated regularly to reduce exposure.