CVE-2021-0704 Auth bypass in Android

What is CVE-2021-0704?

CVE-2021-0704 is a medium-severity authentication bypass vulnerability in Google Android, published on 15 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In createNoCredentialsPermissionNotification and related functions of AccountManagerService.java, there is a possible way to retrieve accounts from the device without permissions due to a permissions bypass. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-9Android ID: A-179338675

Weakness: CWE-281

Which versions are affected by CVE-2021-0704?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0704?

Apply the vendor's patch.

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

Is CVE-2021-0704 being exploited?

There is no known exploitation of CVE-2021-0704 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-179338675, ASB-A-179338675, GHSA-hh56-v5h3-g3f8.