CVE-2021-39704

HIGH

Android - Local Privilege Escalation via NotificationManagerService Permissions Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-39704. PoCs published by nanopathi.

AI-analyzed exploit summary This repository contains functional exploit code for CVE-2021-39704, targeting Android's Autofill framework. The PoC includes test cases that manipulate focus events and autofill responses, demonstrating the vulnerability in a controlled environment.

Description

In deleteNotificationChannelGroup of NotificationManagerService.java, there is a possible way to run foreground service without user notification due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12Android ID: A-209965481

Exploits (1)

nomisec WORKING POC
by nanopathi · poc
https://github.com/nanopathi/framework_base_AOSP10_r33_CVE-2021-39704

This repository contains functional exploit code for CVE-2021-39704, targeting Android's Autofill framework. The PoC includes test cases that manipulate focus events and autofill responses, demonstrating the vulnerability in a controlled environment.

Classification
Working Poc 90%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Android Autofill Framework (AOSP10_r33)
No auth needed
Prerequisites: Android device with Autofill enabled · Access to the target application's UI
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://source.android.com/security/bulletin/2022-03-01

Scores

CVSS v3 7.8
EPSS 0.0019
EPSS Percentile 8.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-281
Status published
Products (3)
google/android 10.0
google/android 11.0
google/android 12.0
Published Mar 16, 2022
Tracked Since Feb 18, 2026