CVE-2021-0331

Name: CVE-2021-0331
Creator: NVD / NIST
Published: 2021-02-10T17:15:20.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2021-0331 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value. This could lead to local escalation of privilege and notification access with User execution privileges needed. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value. This could lead to local escalation of privilege and notification access with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-170731783

Metrics

CVSS 3.1

7.3/10

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

EPSS Probability

0.27%

19.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1021

Affected Software

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

References

https://source.android.com/security/bulletin/2021-02-01Patch, Vendor Advisory
https://source.android.com/security/bulletin/2021-02-01Patch, Vendor Advisory

Timeline

Published: Feb 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-0331?

How severe is CVE-2021-0331?

CVE-2021-0331 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-0331?

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-2021-0331?

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

Scan your code now

Source: NVD / NIST