CVE-2021-39810 — HIGH (7.8)

Vulnerability Description

In verifyDefaults of CardEmulationManager.java, there is a possible way to set a third party app as the default contactless payment app without user consent due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Google	Android	13.0

Related Weaknesses (CWE)

CWE-862

References

https://source.android.com/security/bulletin/2025-09-01Vendor Advisory
https://source.android.com/docs/security/bulletin/android-14Release NotesVendor Advisory

FAQ

What is CVE-2021-39810?

CVE-2021-39810 is a vulnerability with a CVSS score of 7.8 (HIGH). In verifyDefaults of CardEmulationManager.java, there is a possible way to set a third party app as the default contactless payment app without user consent due to a missing permission check. This cou...

How severe is CVE-2021-39810?

CVE-2021-39810 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-39810?

Check the references section above for vendor advisories and patch information. Affected products include: Google Android.