CVE-2021-1020 Privilege escalation in Android

What is CVE-2021-1020?

CVE-2021-1020 is a high-severity vulnerability in Google Android, published on 15 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

In snoozeNotification of NotificationListenerService.java, there is a possible way to disable notification for an arbitrary user due to improper input validation. This could lead to local escalation of privilege with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-12Android ID: A-195111725

Weakness: CWE-20

Which versions are affected by CVE-2021-1020?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-1020?

Apply the vendor's patch.

Is CVE-2021-1020 being exploited?

There is no known exploitation of CVE-2021-1020 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as A-195111725, GHSA-c6qm-6524-j252, PUB-A-195111725.