CVE-2021-39810 json
In verifyDefaults of CardEmulationManager.java, there is a possible way to set a third party app as the default contactless payment app wit…
published 2023-10-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26167
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 1%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Google Android 14.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
0.12% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Google Android
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
source.android.com
/security/bulletin/2025-09-01
vendor-advisory
-
source.android.com
/docs/security/bulletin/android-14
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-39810
- NVD CVE-2021-39810
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