CVE-2021-0571 Auth bypass in Android

What is CVE-2021-0571?

CVE-2021-0571 is a high-severity authentication bypass vulnerability in Google Android, published on 22 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In ActivityTaskManagerService.startActivity() and AppTaskImpl.startActivity() of ActivityTaskManagerService.java and AppTaskImpl.java, there is possible access to restricted activities due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-137395936

Weakness: CWE-863

Which versions are affected by CVE-2021-0571?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0571?

Apply the vendor's patch.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-0571 being exploited?

There is no known exploitation of CVE-2021-0571 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as A-137395936, GHSA-mhrh-8vw7-3jjr, PUB-A-137395936.