What is CVE-2021-0994?

CVE-2021-0994 is a low-severity vulnerability in Google Android, classified under Missing Authorization. CVSS score: 3.3/10. Published 2021-12-15.

How severe is CVE-2021-0994?

Low severity. CVSS v3 base score is 3.3 out of 10.

Auth bypass in Google Android

CVE-2021-0994

In requestRouteToHostAddress of ConnectivityService.java, there is a possible way to determine whether an app is installed, without query permissions, due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12Android ID: A-193801134

Vulnerability class: Broken Access Control

Published 2021-12-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (0.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android — versions 12.0
Android — versions Android-12

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

source.android.com/security/bulletin/pixel/2021-12-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-0994?: CVE-2021-0994 is a low-severity vulnerability in Google Android, classified under Missing Authorization. CVSS score: 3.3/10. Published 2021-12-15.
How severe is CVE-2021-0994?: Low severity. CVSS v3 base score is 3.3 out of 10.