CVE-2025-15567: Health Module Information Disclosure

CVE-2025-15567 Overview

CVE-2025-15567 is a medium-severity vulnerability affecting the Health Module in Vivo devices. The vulnerability stems from insufficient protection mechanisms that may allow attackers with local access to obtain partial sensitive information. This weakness is classified under CWE-306 (Missing Authentication for Critical Function), indicating that the Health Module lacks proper authentication controls to protect sensitive health-related data.

Critical Impact

Local attackers can exploit missing authentication mechanisms to access partial health information stored in the affected Health Module, potentially compromising user privacy.

Affected Products

• Vivo Health Module (specific versions not disclosed)
• Vivo mobile devices with Health Module functionality

Discovery Timeline

• 2026-02-27 - CVE CVE-2025-15567 published to NVD
• 2026-02-27 - Last updated in NVD database

Technical Details for CVE-2025-15567

Vulnerability Analysis

This vulnerability represents a Missing Authentication for Critical Function weakness (CWE-306) in the Vivo Health Module. The flaw allows unauthorized local access to health-related data due to insufficient protection mechanisms implemented within the module. While the impact is limited to partial information disclosure with no effect on system integrity or availability, the exposure of health data raises significant privacy concerns.

The attack requires local access to the device, meaning an attacker would need physical access or another vector to execute code locally on the affected Vivo device. No user interaction is required to exploit this vulnerability, and no special privileges are needed to access the unprotected health data.

Root Cause

The root cause of CVE-2025-15567 is the absence of proper authentication controls within the Health Module's data access mechanisms. The module fails to verify that requests for health information originate from authorized components or users, allowing any local process to potentially retrieve sensitive health-related data. This represents a fundamental design flaw where critical health data protection was not adequately implemented.

Attack Vector

The attack vector for this vulnerability is local, requiring the attacker to have access to the device either physically or through another exploitation chain. Once local access is established, the attacker can interact with the Health Module's unprotected interfaces to extract partial health information. The low complexity of exploitation, combined with no required privileges or user interaction, makes this a straightforward vulnerability to exploit once local access is achieved.

The vulnerability mechanism involves accessing the Health Module's data storage or API endpoints that lack proper authentication checks. For complete technical details, refer to the Vivo Security Advisory #19.

Detection Methods for CVE-2025-15567

Indicators of Compromise

• Unexpected local processes accessing Health Module data directories or storage locations
• Unusual inter-process communication (IPC) calls targeting Health Module services
• Anomalous read operations on health-related databases or files from unauthorized applications

Detection Strategies

• Monitor Health Module service access patterns for unauthorized local process interactions
• Implement application-level logging to track all Health Module data access requests
• Configure endpoint detection rules to alert on suspicious local access to health data storage paths

Monitoring Recommendations

• Enable comprehensive logging for Health Module service interactions
• Deploy behavioral analysis to detect anomalous local process activity targeting health data
• Regularly audit installed applications for potential malicious software capable of exploiting local vulnerabilities

How to Mitigate CVE-2025-15567

Immediate Actions Required

• Check for available security updates from Vivo addressing CVE-2025-15567
• Review the Vivo Security Advisory #19 for vendor-specific guidance
• Ensure devices are not exposed to untrusted local access or potentially malicious applications
• Audit installed applications and remove any suspicious or unnecessary software

Patch Information

Vivo has published security advisory information regarding this vulnerability. Users should visit the Vivo Security Advisory #19 to obtain the latest patch information and update instructions. Apply all available security updates to affected devices as soon as they become available.

Workarounds

• Restrict physical access to affected devices to prevent unauthorized local exploitation
• Avoid installing applications from untrusted sources that could be used as a vector for local attacks
• Consider disabling or restricting Health Module functionality if not required until patches are applied
• Implement device management policies to control application installations on enterprise-managed devices