CVE-2025-36890: Google Android Privilege Escalation Flaw

CVE-2025-36890 Overview

CVE-2025-36890 is a critical Elevation of Privilege vulnerability affecting Google Android devices. This vulnerability allows an attacker to escalate privileges through a network-based attack vector without requiring any user interaction or prior authentication. The flaw is classified under CWE-269 (Improper Privilege Management), indicating a fundamental weakness in how the affected component handles privilege boundaries.

Critical Impact

This vulnerability enables complete system compromise through privilege escalation, potentially allowing attackers to gain elevated access to the Android operating system with high impact to confidentiality, integrity, and availability.

Affected Products

• Google Android (all versions prior to the September 2025 security patch)
• Google Pixel devices running vulnerable Android builds
• Android devices from OEM partners pending security updates

Discovery Timeline

• 2025-09-01 - Google releases security bulletin addressing the vulnerability
• 2025-09-04 - CVE-2025-36890 published to NVD
• 2025-09-29 - Last updated in NVD database

Technical Details for CVE-2025-36890

Vulnerability Analysis

This Elevation of Privilege vulnerability exists due to improper privilege management (CWE-269) within the Android operating system. The vulnerability can be exploited remotely over the network without requiring any user interaction or authentication, making it particularly dangerous. An attacker who successfully exploits this vulnerability could elevate their privileges to gain unauthorized access to protected system resources and data.

The vulnerability affects the core privilege management mechanisms in Android, allowing attackers to bypass security boundaries that normally prevent unauthorized access to system-level functionality.

Root Cause

The root cause of CVE-2025-36890 lies in improper privilege management within the affected Android component. This weakness allows an attacker to perform actions with higher privileges than intended by the security model. The flaw enables privilege escalation by failing to properly validate or enforce privilege boundaries during certain operations accessible over the network.

Attack Vector

The attack vector for this vulnerability is network-based, meaning exploitation can occur remotely without physical access to the device. The attack requires no privileges on the target system and does not depend on user interaction, significantly lowering the barrier for successful exploitation. An attacker could potentially leverage this vulnerability to:

1. Gain elevated system privileges without authentication
2. Access protected resources and sensitive data
3. Modify system configurations and settings
4. Potentially achieve persistent access to the compromised device

The vulnerability can be exploited with low complexity, making it accessible to a wide range of threat actors.

Detection Methods for CVE-2025-36890

Indicators of Compromise

• Unusual privilege escalation events in Android system logs
• Unexpected network connections to suspicious endpoints
• Anomalous process execution with elevated privileges
• System configuration changes without authorized user action

Detection Strategies

• Monitor Android device logs for privilege escalation attempts and anomalous system calls
• Implement network traffic analysis to detect exploitation attempts targeting Android devices
• Deploy endpoint detection solutions capable of identifying privilege abuse patterns
• Review audit logs for unauthorized access to protected system resources

Monitoring Recommendations

• Enable comprehensive logging on Android devices through developer options for forensic analysis
• Implement mobile threat defense solutions to monitor for exploitation attempts
• Configure security information and event management (SIEM) rules to alert on privilege escalation patterns
• Regularly audit device security patch levels across your organization's mobile fleet

How to Mitigate CVE-2025-36890

Immediate Actions Required

• Apply the September 2025 Android security patch immediately to all affected devices
• Verify patch installation by checking the security patch level in device settings
• Isolate unpatched devices from sensitive network resources until updates can be applied
• Enable automatic security updates on all managed Android devices

Patch Information

Google has addressed this vulnerability in the September 2025 Android Security Bulletin. The fix is included in the 2025-09-01 security patch level. Organizations and users should update their devices to this patch level or later to remediate the vulnerability. For detailed patch information, refer to the Android Security Bulletin.

Pixel devices receive updates directly from Google, while other Android device manufacturers will distribute patches according to their update schedules. Enterprise administrators should prioritize deployment of this security update through their mobile device management (MDM) solutions.

Workarounds

• Limit network exposure of vulnerable Android devices until patches are applied
• Implement network segmentation to reduce attack surface for mobile devices
• Enable Android's built-in security features such as Google Play Protect
• Consider restricting device connectivity to trusted networks only until patched

# Verify Android security patch level via ADB
adb shell getprop ro.build.version.security_patch
# Expected output should be 2025-09-01 or later