CVE-2021-0309

Name: CVE-2021-0309
Creator: NVD / NIST
Published: 2021-01-11T22:15:13.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2021-0309 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In onCreate of grantCredentialsPermissionActivity, there is a confused deputy. This could lead to local information disclosure and account access with no additional execution privileges needed. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

In onCreate of grantCredentialsPermissionActivity, there is a confused deputy. This could lead to local information disclosure and account access with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android; Versions: Android-8.1, Android-9, Android-10, Android-11, Android-8.0; Android ID: A-158480899.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.16%

5.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Google	Android	8.0
Google	Android	8.1
Google	Android	9.0
Google	Android	10.0
Google	Android	11.0

References

https://source.android.com/security/bulletin/2021-01-01Vendor Advisory
https://source.android.com/security/bulletin/2021-01-01Vendor Advisory

Timeline

Published: Jan 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-0309?

How severe is CVE-2021-0309?

CVE-2021-0309 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-0309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-0309?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST