CVE-2025-21058 in Routines
Summary
by MITRE • 10/10/2025
Improper access control in Routines prior to version 4.8.7.1 in Android 15 and 4.9.6.0 in Android 16 allows local attackers to potentially execute arbitrary code with SystemUI privilege.
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Analysis
by VulDB Data Team • 10/10/2025
The vulnerability identified as CVE-2025-21058 represents a critical access control flaw within the Routines component of Android operating systems, affecting versions prior to 4.8.7.1 in Android 15 and 4.9.6.0 in Android 16. This issue stems from inadequate privilege validation mechanisms that permit local attackers to escalate their execution context from standard user privileges to SystemUI level access, creating a significant vector for arbitrary code execution. The vulnerability manifests within the Android framework's routine management system where proper authorization checks fail to validate the legitimacy of requests originating from untrusted processes or components.
The technical implementation of this flaw involves a failure in the Android permission model where the Routines service does not adequately verify the calling process identity before executing sensitive operations. This improper access control vulnerability directly maps to CWE-284, which specifically addresses inadequate access control mechanisms in software systems. The flaw exists in the inter-process communication pathways where routine execution triggers are not properly authenticated, allowing malicious applications or compromised processes to inject commands that are then executed with elevated SystemUI privileges. Attackers can exploit this by crafting malicious routine triggers or by leveraging existing compromised applications that have access to routine management interfaces.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with access to critical system components that control user interface elements and system notifications. SystemUI privileges enable execution of code that can manipulate display elements, intercept user interactions, modify system notifications, and potentially access sensitive data through the user interface layer. This access level allows for sophisticated attacks including screen overlay attacks, notification manipulation, and potential data exfiltration through system-level interfaces. The vulnerability is particularly dangerous because it operates within the trusted system framework, making detection and prevention more challenging for security monitoring systems.
Mitigation strategies for CVE-2025-21058 should prioritize immediate system updates to the patched versions of Android 15 and 16, specifically versions 4.8.7.1 and 4.9.6.0 respectively. Organizations should implement comprehensive application whitelisting policies to restrict which applications can interact with routine management services, and deploy runtime monitoring solutions that can detect anomalous behavior patterns associated with privilege escalation attempts. The remediation process must include thorough security assessments of all routine management configurations and implementation of additional authentication layers beyond the existing system controls. Security teams should also consider implementing behavioral analytics to identify potential exploitation attempts and establish incident response procedures specifically addressing system privilege escalation vulnerabilities. This vulnerability aligns with ATT&CK technique T1068, which covers locally executed malicious code with elevated privileges, emphasizing the need for comprehensive endpoint protection and privilege monitoring capabilities.