CVE-2026-20622 is a privacy vulnerability identified in Apple macOS operating systems, specifically addressed in macOS Sequoia 15.7.4 and macOS Tahoe 26.3. The root cause is improper handling of temporary files, which allows a malicious or compromised application to capture the user's screen without explicit permission or user interaction. This vulnerability falls under CWE-284 (Improper Access Control), indicating that the system fails to enforce correct access restrictions on sensitive resources—in this case, the screen content. The CVSS v3.1 base score is 7.5, with vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, meaning the vulnerability is remotely exploitable over the network with low attack complexity, requires no privileges or user interaction, and impacts confidentiality severely by exposing screen content. Integrity and availability are not affected. Although no known exploits have been reported in the wild, the potential for sensitive data leakage through unauthorized screen capture is significant. The vulnerability affects all macOS versions prior to the patched releases, and the fix involves improved temporary file handling to prevent unauthorized access. Due to the nature of the vulnerability, any app installed on the system could potentially exploit this flaw to spy on user activity, capturing sensitive information displayed on the screen.

The primary impact of CVE-2026-20622 is a severe breach of user privacy and confidentiality. Unauthorized screen capture can expose sensitive information such as passwords, personal data, financial information, or confidential business documents. For organizations, this could lead to data leaks, intellectual property theft, and regulatory compliance violations, especially in sectors handling sensitive or classified information. Since the vulnerability requires no privileges or user interaction, attackers could exploit it remotely if they manage to get a malicious app installed or leverage other attack vectors to execute code. This broadens the attack surface and increases risk. Although integrity and availability are not compromised, the confidentiality breach alone can cause significant reputational damage and financial loss. Enterprises relying heavily on macOS devices for critical operations are particularly vulnerable, as well as individuals in high-risk roles such as journalists, activists, or government employees.

To mitigate CVE-2026-20622, organizations and users should immediately update affected macOS systems to Sequoia 15.7.4 or Tahoe 26.3 or later, where the vulnerability is patched. Beyond patching, implement strict application control policies to limit the installation of untrusted or unsigned applications that could exploit this flaw. Use macOS privacy settings to restrict screen recording permissions only to trusted applications and regularly audit these permissions. Employ endpoint detection and response (EDR) solutions capable of monitoring unusual screen capture activities or unauthorized access to temporary files. Educate users about the risks of installing unknown software and encourage the use of Apple’s notarization and app store mechanisms to reduce exposure. For highly sensitive environments, consider additional monitoring of file system access patterns related to temporary files and screen capture APIs. Finally, maintain up-to-date backups and incident response plans to quickly address any potential data exposure incidents.