CVE-2025-15567 is a vulnerability classified under CWE-306 (Missing Authentication for Critical Function) found in the vivo Health application, specifically in versions prior to 5.3.0.0. The flaw arises because certain critical functions within the Health Module lack proper authentication mechanisms, allowing unauthorized users to access partial health information without any authentication or user interaction. The CVSS 4.0 base score is 5.1, reflecting a medium severity level, with the vector indicating local attack vector (AV:L), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and limited confidentiality impact (VC:L). The vulnerability does not affect integrity or availability and does not require network access, limiting its exploitation scope. Although no public exploits are known, the vulnerability poses a risk of sensitive health data exposure, which can lead to privacy breaches and potential regulatory non-compliance. The issue was publicly disclosed on February 27, 2026, and no official patches were linked at the time of reporting, emphasizing the need for vendor updates and user vigilance. The vulnerability is particularly relevant for environments where vivo Health is deployed on devices used in healthcare or personal health monitoring contexts.

The primary impact of CVE-2025-15567 is the unauthorized disclosure of partial health information due to missing authentication on critical functions. This can lead to privacy violations, loss of user trust, and potential legal consequences under data protection regulations such as GDPR or HIPAA. Organizations relying on vivo Health for sensitive health data management may face reputational damage and compliance risks if this vulnerability is exploited. Since exploitation requires local access, the threat is more significant in environments where devices are shared, physically accessible by unauthorized individuals, or compromised by malware. The limited confidentiality impact reduces the risk of full data leakage but still represents a meaningful exposure of sensitive information. The vulnerability does not affect system integrity or availability, so operational disruption is unlikely. However, the exposure of health data can have serious implications for individuals’ privacy and organizational compliance.

To mitigate CVE-2025-15567, organizations and users should upgrade vivo Health to version 5.3.0.0 or later once the patch is released by the vendor. Until then, restrict physical and local access to devices running vulnerable versions to trusted users only. Implement device-level security controls such as strong authentication, screen locks, and encryption to prevent unauthorized local access. Monitor device usage and audit access to health data functions to detect suspicious activity. For organizations deploying vivo Health in healthcare settings, integrate endpoint security solutions that can detect and block unauthorized local access attempts. Engage with the vendor for timely updates and verify that authentication controls are properly enforced in future versions. Additionally, educate users about the risks of sharing devices and the importance of securing personal health information.