CVE-2021-39749

HIGH

Android 12L - Missing Authorization Check in WindowManager

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-39749. PoCs published by michalbednarski.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2021-39749, an Android 12L Beta vulnerability allowing unauthorized activity starts. It includes root cause analysis, patch diffs, and a walkthrough of the exploit mechanism involving `TaskFragmentOrganizer` and `Binder.getCallingUid()` misuse.

Description

In WindowManager, there is a possible way to start non-exported and protected activities due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12LAndroid ID: A-205996115

Exploits (1)

nomisec WRITEUP 31 stars
by michalbednarski · poc
https://github.com/michalbednarski/OrganizerTransaction

This repository provides a detailed technical analysis of CVE-2021-39749, an Android 12L Beta vulnerability allowing unauthorized activity starts. It includes root cause analysis, patch diffs, and a walkthrough of the exploit mechanism involving `TaskFragmentOrganizer` and `Binder.getCallingUid()` misuse.

Classification
Writeup 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Android 12L Beta
No auth needed
Prerequisites: Android 12L Beta device · Hidden API checks disabled via ADB
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 7.8
EPSS 0.0019
EPSS Percentile 9.2%
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-862
Status published
Products (1)
google/android 12.1
Published Mar 30, 2022
Tracked Since Feb 18, 2026