What is CVE-2021-0517?

CVE-2021-0517 is a high-severity vulnerability in Google Android, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2021-06-21.

How severe is CVE-2021-0517?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Google Android

CVE-2021-0517

In updateCapabilities of ConnectivityService.java, there is a possible incorrect network state determination due to a logic error in the code. This could lead to biasing of networking tasks to occur on non-VPN networks, which could lead to remote information disclosure, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-179053823

Published 2021-06-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Google Android — versions 11.0
Android — versions Android-11

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

References

source.android.com/security/bulletin/2021-06-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-0517?: CVE-2021-0517 is a high-severity vulnerability in Google Android, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2021-06-21.
How severe is CVE-2021-0517?: High severity. CVSS v3 base score is 7.5 out of 10.