CVE-2023-21027 Auth bypass in Android

What is CVE-2023-21027?

CVE-2023-21027 is a high-severity authentication bypass vulnerability in Google Android, published on 24 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In multiple functions of PasspointXmlUtils.java, there is a possible authentication misconfiguration due to a logic error in the code. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-216854451

Weakness: CWE-287

Which versions are affected by CVE-2023-21027?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2023-21027?

Apply the vendor's patch.

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

Is CVE-2023-21027 being exploited?

There is no known exploitation of CVE-2023-21027 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-216854451, GHSA-w4q6-hmcg-gwmg, PUB-A-216854451.